What is - 5x+2y=9

y=7x

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

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