Question

Find the solution of this system of equations. Separate the x- and y- with commas.

x = -6 + y
and
-7x + 9y = 8

Answer 1

Answer:

x = -23

y = -17

Step-by-step explanation:

$x = - 6 + y \\ - 7x + 9y = 8 \\ \\ - 7( - 6 + y) + 9y = 8 \\ 42 - 7y + 9y = 8 \\ 2y = 8 - 42 \\ y = \frac{ - 34}{2} \\ y = - 17 \\ \\ x = - 6 + y \\ x = - 6 + ( - 17) \\ x = - 6 - 17 \\ x = - 23$

Answer 2

Answer:

Step-by-step explanation:

-7(-6 + y) + 9y = 8

42 - 7y + 9y = 8

2y + 42 = 8

2y = -34

y = -17

x = -6 - 17

x = -23

(-23, -17)