Question

-8z+4=-9z
with work shown

Answer 1

z = −4

Explanation:

Step 1: Add 9z to both sides.

−8z + 4 + 9z = −9z + 9z

z + 4 = 0

Step 2: Subtract 4 from both sides.

z + 4 − 4 = 0 − 4

z = −4

Answer 2

-4 = z

Explanation:

-8z + 4 = -9z

+8z +8z

4 = -z

4 ÷ -1 = -z ÷ -1

-4 = z