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What is the answer to 9x-2y=-3 minus 3x+5y=27 as a coordinate point? Plz respondn w/ question answer and a how to guide  a.s.a.p!!smiley

 

Been stuck on this question for like an hour!angry

Guest Jul 7, 2017
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 #1
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9x-2y = -3,  - 3x+5y=27

 

Note that if we multiply the second equation by 3, we have

 

-9x + 15y = 81

 

So now we have

 

  9x  -  2y   = -3

- 9x + 15y = 81          add  these  and we have

 

13y  =  78             divide both sides by 13

 

y =  6

 

And to find x we can use

 

9x - 2(6)  = -3

 

9x -  12  = -3    add 12 to both sides

 

9x  =  9         divide both sides by 9

 

x =  1

 

So....the answer is (x,y) = (1, 6 )

 

 

 

cool cool cool

CPhill  Jul 7, 2017
edited by CPhill  Jul 7, 2017

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