-1=3-z-z

Solution for -1=3-z-z equation:

Simplifying
-1 = 3 + -1z + -1z

Combine like terms: -1z + -1z = -2z
-1 = 3 + -2z

Solving
-1 = 3 + -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.
-1 + 2z = 3 + -2z + 2z

Combine like terms: -2z + 2z = 0
-1 + 2z = 3 + 0
-1 + 2z = 3

Add '1' to each side of the equation.
-1 + 1 + 2z = 3 + 1

Combine like terms: -1 + 1 = 0
0 + 2z = 3 + 1
2z = 3 + 1

Combine like terms: 3 + 1 = 4
2z = 4

Divide each side by '2'.
z = 2

Simplifying
z = 2