3-9=-2z

Solution for 3-9=-2z equation:

Simplifying
3 + -9 = -2z

Combine like terms: 3 + -9 = -6
-6 = -2z

Solving
-6 = -2z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '2z' to each side of the equation.
-6 + 2z = -2z + 2z

Combine like terms: -2z + 2z = 0
-6 + 2z = 0

Add '6' to each side of the equation.
-6 + 6 + 2z = 0 + 6

Combine like terms: -6 + 6 = 0
0 + 2z = 0 + 6
2z = 0 + 6

Combine like terms: 0 + 6 = 6
2z = 6

Divide each side by '2'.
z = 3

Simplifying
z = 3