Question

Solve system of linear equations by substitution -2x+9y=15
x+7=4 ​

Answer 1

x = -3. | y = 1. | (-3,1)

Explanation:

-2x+9y=15

x+7=4

-7. -7

x= -3

-2(-3) + 9y =15

6 + 9y= 15

-6. -6

9y = 9

÷9. ÷9

y = 1

Answer 2

1

Explanation:

-2x+9y=15

x+7=4 ​

Solve for X.

x +7=4

-7. -7

x = -3

Plug in X into the first equation

-2(-3) + 9y = 15

6 + 9y = 15

-6. -6

9y = 9

Divide by 9 on both sides

9/9=1