1y-21=4

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Solution for 1y-21=4 equation: 


Simplifying
1y + -21 = 4

Reorder the terms:
-21 + 1y = 4

Solving
-21 + 1y = 4

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 + 1y = 4 + 21

Combine like terms: -21 + 21 = 0
0 + 1y = 4 + 21
1y = 4 + 21

Combine like terms: 4 + 21 = 25
1y = 25

Divide each side by '1'.
y = 25

Simplifying
y = 25

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