2z-21=91

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Solution for 2z-21=91 equation: 


Simplifying
2z + -21 = 91

Reorder the terms:
-21 + 2z = 91

Solving
-21 + 2z = 91

Solving for variable 'z'.

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

Add '21' to each side of the equation.
-21 + 21 + 2z = 91 + 21

Combine like terms: -21 + 21 = 0
0 + 2z = 91 + 21
2z = 91 + 21

Combine like terms: 91 + 21 = 112
2z = 112

Divide each side by '2'.
z = 56

Simplifying
z = 56

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