y-21=90

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Solution for y-21=90 equation: 


Simplifying
y + -21 = 90

Reorder the terms:
-21 + y = 90

Solving
-21 + y = 90

Solving for variable 'y'.

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

Add '21' to each side of the equation.
-21 + 21 + y = 90 + 21

Combine like terms: -21 + 21 = 0
0 + y = 90 + 21
y = 90 + 21

Combine like terms: 90 + 21 = 111
y = 111

Simplifying
y = 111

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