Question

Solve for z.
42 = -7 (z - 3)
z = ?

Answer 1

You divide by -7 on both sides then add three to both sides and the answer is -3

Answer 2

To solve for z you need to get it by itself and have the other half of the equal sign simplified.

42=-7(z-3)

42=-7z+21 (you would distribute the -7 through the parentheses.)

21=-7z ( you would then subtract 21 from both sides)

-3=z ( last your would divide -7 to both sides to get z by itself)

z=-3

Explanation: