RKDMAN Posted November 6, 2007 Report Share Posted November 6, 2007 okay im doing basic 8th grade algebra heres an example of what some of questions are like 0.4(7x-4)=5(5x-7) stuff like that im just wondering if their are ne tips to help me remember and get this stuff good thanks in advance. Link to comment Share on other sites More sharing options...
Jesus Posted November 7, 2007 Report Share Posted November 7, 2007 distribute and then get all the x's to 1 side. Link to comment Share on other sites More sharing options...
Pete Posted November 7, 2007 Report Share Posted November 7, 2007 You just gotta egual the equation to Zero then you factorize and then you isolate your zero so it could goes like that 4(7x-4)=5(5x-7) 28x-16 =25x-35 28x-25x-16-35=0 3x-51=0 3(x - 17)=0 x=17 cause (x-17)=0 Link to comment Share on other sites More sharing options...
Jesus Posted November 8, 2007 Report Share Posted November 8, 2007 You just gotta egual the equation to Zero then you factorize and then you isolate your zero so it could goes like that4(7x-4)=5(5x-7) 28x-16 =25x-35 28x-25x-16-35=0 3x-51=0 3(x - 17)=0 x=17 cause (x-17)=0 dont listen to this guy, plug 17 into the original problem and you get 460=390... 4(7x-4)=5(5x-7) 28x-16=25x-35 3x-16=-35 3x=-19 x=-6 1/3 Link to comment Share on other sites More sharing options...
Pete Posted November 8, 2007 Report Share Posted November 8, 2007 You just gotta egual the equation to Zero then you factorize and then you isolate your zero so it could goes like that4(7x-4)=5(5x-7) 28x-16 =25x-35 28x-25x-16-35=0 3x-51=0 3(x - 17)=0 x=17 cause (x-17)=0 dont listen to this guy, plug 17 into the original problem and you get 460=390... 4(7x-4)=5(5x-7) 28x-16=25x-35 3x-16=-35 3x=-19 x=-6 1/3 my thing just doesnt work cause i made it with 4 instead of 0.4 But my way is the good algebric way to find it the way of jesus wont get you the whole answer if youre x has 2 values or more ( x^2 or more ) Link to comment Share on other sites More sharing options...
Jesus Posted November 8, 2007 Report Share Posted November 8, 2007 You just gotta egual the equation to Zero then you factorize and then you isolate your zero so it could goes like that4(7x-4)=5(5x-7) 28x-16 =25x-35 28x-25x-16-35=0 3x-51=0 3(x - 17)=0 x=17 cause (x-17)=0 dont listen to this guy, plug 17 into the original problem and you get 460=390... 4(7x-4)=5(5x-7) 28x-16=25x-35 3x-16=-35 3x=-19 x=-6 1/3 my thing just doesnt work cause i made it with 4 instead of 0.4 But my way is the good algebric way to find it the way of jesus wont get you the whole answer if youre x has 2 values or more ( x^2 or more ) you use a different formula if you have x^2 or more... please don't try to help people with math if you don't know the first thing about it. Link to comment Share on other sites More sharing options...
foxshox Posted November 8, 2007 Report Share Posted November 8, 2007 okay im doing basic 8th grade algebra heres an example of what some of questions are like 0.4(7x-4)=5(5x-7) stuff like that im just wondering if their are ne tips to help me remember and get this stuff good thanks in advance. Alright heres what you do: First since you see the decimal to the *tenths* place, you multiply the whole thing by 10 like: 10*.4(7x-4)=10*5(5x-7) 4(7x-4)=50(5x-7) Then just work through it like so 28x-16=250x-350 350-16=250x-28x 334=222x 334/222=x You can still distribute the .4, but if your new to this, keeping them round numbers makes it easier to look at. Whatever place the decimal is like "tenth" or 'hundredth" multiply it by 10 or 100 respectively. So if it was .05(3x-2)=4(3x-4).. you see its to the 100th place, so you multiply it by 100 and get 5(3x-2)=400(3x-4). Just so long as you multiply both sides by the same number, it will have no effect on the answer itself. Link to comment Share on other sites More sharing options...
WhyteBoi Posted November 10, 2007 Report Share Posted November 10, 2007 unless its zero Link to comment Share on other sites More sharing options...
foxshox Posted November 10, 2007 Report Share Posted November 10, 2007 Uhh actually, if you multiply by zero, it will give you 0=0, which is true. It won't give you a definitive answer, but it won't be wrong. Link to comment Share on other sites More sharing options...
RKDMAN Posted November 11, 2007 Author Report Share Posted November 11, 2007 okay im doing basic 8th grade algebra heres an example of what some of questions are like 0.4(7x-4)=5(5x-7) stuff like that im just wondering if their are ne tips to help me remember and get this stuff good thanks in advance. Alright heres what you do: First since you see the decimal to the *tenths* place, you multiply the whole thing by 10 like: 10*.4(7x-4)=10*5(5x-7) 4(7x-4)=50(5x-7) Then just work through it like so 28x-16=250x-350 350-16=250x-28x 334=222x 334/222=x You can still distribute the .4, but if your new to this, keeping them round numbers makes it easier to look at. Whatever place the decimal is like "tenth" or 'hundredth" multiply it by 10 or 100 respectively. So if it was .05(3x-2)=4(3x-4).. you see its to the 100th place, so you multiply it by 100 and get 5(3x-2)=400(3x-4). Just so long as you multiply both sides by the same number, it will have no effect on the answer itself. ok guys this is the answer i was looking for thanks alot man. this actually helps i got a exam tuesday i think ill get aq good grade Link to comment Share on other sites More sharing options...
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