Question

Solve the system by substitution.
8x – y = 42
-43 - 6 = y

Answer 1

x = .875 y = -49

Explanation:

(8x - y = 42)

(y = -43 - 6) or (y = -49)

Since we have our y value, we can plug it into our top equation:

8x -(-49) = 42

8x + 49 = 42

-42 -42

8x = 7

/8 /8

x = 0.875

To check the work:

8(0.875) - 49 = 42

7 - 49 = 42