y+7=21

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Solution for y+7=21 equation: 


Simplifying
y + 7 = 21

Reorder the terms:
7 + y = 21

Solving
7 + y = 21

Solving for variable 'y'.

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

Add '-7' to each side of the equation.
7 + -7 + y = 21 + -7

Combine like terms: 7 + -7 = 0
0 + y = 21 + -7
y = 21 + -7

Combine like terms: 21 + -7 = 14
y = 14

Simplifying
y = 14

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