What's is the answer to y=3x+7

Y=x-9

( - 8, - 17)

Step-by-step explanation:

Given the 2 equations

y = 3x + 7 → (1)

y = x - 9 → (2)

Substitute y = 3x + 7 into (2)

3x + 7 = x - 9 (subtract x from both sides)

2x + 7 = - 9 (subtract 7 from both sides)

2x = - 16 (divide both sides by 2)

x = - 8

Substitute x = - 8 into either of the 2 equations for corresponding value of y

Substituting into (2)

y = - 8 - 9 = - 17

Solution is ( - 8, - 17)