Question

Solve for the unknown:

2z - (z-1) = 5z - 15

Answer 1

z=4

Explanation:

You would distribute the negative sign outside of the parentheses and get:

2z-z+1=5z-15

Then combine like terms and get:

z+1=5z-15

Subtract 5z from both sides:

-4z+1=-15

Subtract 1 from both sides:

-4z=-16

Then divide both sides by -4:

z=4

Answer 2

z equals 4. See attached