2y=y+21

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Solution for 2y=y+21 equation: 


Simplifying
2y = y + 21

Reorder the terms:
2y = 21 + y

Solving
2y = 21 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
2y + -1y = 21 + y + -1y

Combine like terms: 2y + -1y = 1y
1y = 21 + y + -1y

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

Divide each side by '1'.
y = 21

Simplifying
y = 21

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