samuel741 samuel741

22-02-2017
Mathematics

contestada

9x + 7y = 10
7x + 7y = 14

Respuesta :

trishinada63 trishinada63

22-02-2017

Multiply the second row by -1 to cancel out the 7x.
9x+7y=10
-7x-7y=-14
2x=-4
x=-2

9(-2)+7y=10
-18+7y=10
7y=28
y=4

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hannahdumb hannahdumb

22-02-2017

y=4/7
x=4/9
this is the answer

Answer Link

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