11-9z+9=20-9z

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Solution for 11-9z+9=20-9z equation: 


Simplifying
11 + -9z + 9 = 20 + -9z

Reorder the terms:
11 + 9 + -9z = 20 + -9z

Combine like terms: 11 + 9 = 20
20 + -9z = 20 + -9z

Add '-20' to each side of the equation.
20 + -20 + -9z = 20 + -20 + -9z

Combine like terms: 20 + -20 = 0
0 + -9z = 20 + -20 + -9z
-9z = 20 + -20 + -9z

Combine like terms: 20 + -20 = 0
-9z = 0 + -9z
-9z = -9z

Add '9z' to each side of the equation.
-9z + 9z = -9z + 9z

Combine like terms: -9z + 9z = 0
0 = -9z + 9z

Combine like terms: -9z + 9z = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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