wolf
  • wolf
solve for x and y 2x-9y=-23 8x-5y=1
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
This looks like a great problem to do elimination in. Take your first equation and multiply it through by a constant which will allow you to vertically combine the two equations so that you are left with one variable. Once you've done that, you can plug in your answer to either of the two original equations to get the second variable's value. It looks like the x coefficients will be easy to cancel out. (Hint: the constant you multiply through is going to be negative.)
anonymous
  • anonymous
x = 2, y= 3 use elimination method, multiply (1) by 4 and subtract from (2)
wolf
  • wolf
multiply by negative 4?

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anonymous
  • anonymous
either multiply by 4 and subtract OR multiply by -4 and add them........
wolf
  • wolf
oh ok thanks thats what i was confused about silly me
bahrom7893
  • bahrom7893
or just solve the first equation for x in terms of y, and plug it in into the second equation
anonymous
  • anonymous
it would be more complex........
wolf
  • wolf
yea I got it now thanks
anonymous
  • anonymous
you welcome.........
bahrom7893
  • bahrom7893
lol I dunno, im just used to that..I learnt it that way see, gets more confusing for me, but whichever way is comfortable and wolf, u should fan sudhanshu_kmr

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