15z-1=90

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Solution for 15z-1=90 equation: 


Simplifying
15z + -1 = 90

Reorder the terms:
-1 + 15z = 90

Solving
-1 + 15z = 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 + 15z = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 15z = 90 + 1
15z = 90 + 1

Combine like terms: 90 + 1 = 91
15z = 91

Divide each side by '15'.
z = 6.066666667

Simplifying
z = 6.066666667

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