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=

Respuesta :

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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