12=20-z

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Solution for 12=20-z equation:


Simplifying
12 = 20 + -1z

Solving
12 = 20 + -1z

Solving for variable 'z'.

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

Add 'z' to each side of the equation.
12 + z = 20 + -1z + z

Combine like terms: -1z + z = 0
12 + z = 20 + 0
12 + z = 20

Add '-12' to each side of the equation.
12 + -12 + z = 20 + -12

Combine like terms: 12 + -12 = 0
0 + z = 20 + -12
z = 20 + -12

Combine like terms: 20 + -12 = 8
z = 8

Simplifying
z = 8

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