fuzzyaaron
fuzzyaaron fuzzyaaron
  • 03-05-2017
  • Mathematics
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This is all I know what to do any help?

This is all I know what to do any help class=

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choco4
choco4 choco4
  • 03-05-2017
you can multiply the second equation by -2 

-5x + y = 15         everything by -2

10x - 2y = -30

now you can solve them

2x + 2y = -6
10x - 2y = -30

y cancels

2x= -6
10x = -30


12x = -36
/12.     /12

x = -3 


now to solve for y you substitute x for -3

-5(-3) + y = 15
15 + y = 15 
-15        -15

       y= 0
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