13y-1=90

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Solution for 13y-1=90 equation: 


Simplifying
13y + -1 = 90

Reorder the terms:
-1 + 13y = 90

Solving
-1 + 13y = 90

Solving for variable 'y'.

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

Add '1' to each side of the equation.
-1 + 1 + 13y = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 13y = 90 + 1
13y = 90 + 1

Combine like terms: 90 + 1 = 91
13y = 91

Divide each side by '13'.
y = 7

Simplifying
y = 7

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