y+20=21

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Solution for y+20=21 equation: 


Simplifying
y + 20 = 21

Reorder the terms:
20 + y = 21

Solving
20 + y = 21

Solving for variable 'y'.

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

Add '-20' to each side of the equation.
20 + -20 + y = 21 + -20

Combine like terms: 20 + -20 = 0
0 + y = 21 + -20
y = 21 + -20

Combine like terms: 21 + -20 = 1
y = 1

Simplifying
y = 1

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