Question

Solve for z. 7z+ 4 – 9z = 8 z = [?]​

Answer 1

z=-2

Explanation:

7z+4-9z=8

7z-9z=8-4

-2z=4 divide by-2

z=-2

Answer 2

z = -2

Explanation:

7z + 4 - 9z = 8 (The first step is to combine like terms, so 7z -9z = -2z)

-2z + 4 = 8 (Subtract 4 on each side)

-2z = 4 (Divide each side by -2)

z = -2

You can plug -2 back in to check, and you get:

7(-2) + 4 -9(-2) = 8

-14 + 4 + 18 = 8

8 = 8

Hopefully, this helped. Good luck!