2z-1=90

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Solution for 2z-1=90 equation: 


Simplifying
2z + -1 = 90

Reorder the terms:
-1 + 2z = 90

Solving
-1 + 2z = 90

Solving for variable 'z'.

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

Add '1' to each side of the equation.
-1 + 1 + 2z = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 2z = 90 + 1
2z = 90 + 1

Combine like terms: 90 + 1 = 91
2z = 91

Divide each side by '2'.
z = 45.5

Simplifying
z = 45.5

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