z-13=21

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Solution for z-13=21 equation: 


Simplifying
z + -13 = 21

Reorder the terms:
-13 + z = 21

Solving
-13 + z = 21

Solving for variable 'z'.

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

Add '13' to each side of the equation.
-13 + 13 + z = 21 + 13

Combine like terms: -13 + 13 = 0
0 + z = 21 + 13
z = 21 + 13

Combine like terms: 21 + 13 = 34
z = 34

Simplifying
z = 34

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