21+z=21

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Solution for 21+z=21 equation: 


Simplifying
21 + z = 21

Add '-21' to each side of the equation.
21 + -21 + z = 21 + -21

Combine like terms: 21 + -21 = 0
0 + z = 21 + -21
z = 21 + -21

Combine like terms: 21 + -21 = 0
z = 0

Solving
z = 0

Solving for variable 'z'.

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

Simplifying
z = 0

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