diorchloe08 diorchloe08
  • 02-06-2020
  • Mathematics
contestada

what is −5x+2y=9
y=7x
​

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 02-06-2020

Answer:

x=1, y= 7

Step-by-step explanation:

−5x+2y=9

y=7x

Substitute the second equation in for the first

-5x +2(7x) = 9

-5x + 14x = 9

Combine like terms

9x = 9

Divide by 9

9x/9 = 9/9

x =1

Now find y

y = 7(1)

y =7

Answer Link
bluesheep124 bluesheep124
  • 02-06-2020

Answer:

Step-by-step explanation:

-5x+2y=9

y=7x

Since you know what y is relative to x, you can plug it into the formula to find your answer.

-5x+2(7x)=9

14x-5x=9

x=1

y=7

Answer Link

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