y-54=21

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Solution for y-54=21 equation: 


Simplifying
y + -54 = 21

Reorder the terms:
-54 + y = 21

Solving
-54 + y = 21

Solving for variable 'y'.

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

Add '54' to each side of the equation.
-54 + 54 + y = 21 + 54

Combine like terms: -54 + 54 = 0
0 + y = 21 + 54
y = 21 + 54

Combine like terms: 21 + 54 = 75
y = 75

Simplifying
y = 75

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