samuel741
samuel741 samuel741
  • 22-02-2017
  • Mathematics
contestada


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

Respuesta :

trishinada63
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
Answer Link
hannahdumb
hannahdumb hannahdumb
  • 22-02-2017
y=4/7
x=4/9
this is the answer
Answer Link

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