y+21=25

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Solution for y+21=25 equation: 


Simplifying
y + 21 = 25

Reorder the terms:
21 + y = 25

Solving
21 + y = 25

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 = 25 + -21

Combine like terms: 21 + -21 = 0
0 + y = 25 + -21
y = 25 + -21

Combine like terms: 25 + -21 = 4
y = 4

Simplifying
y = 4

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