2y+3=(y+21)

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Solution for 2y+3=(y+21) equation:


Simplifying
2y + 3 = (y + 21)

Reorder the terms:
3 + 2y = (y + 21)

Reorder the terms:
3 + 2y = (21 + y)

Remove parenthesis around (21 + y)
3 + 2y = 21 + y

Solving
3 + 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.
3 + 2y + -1y = 21 + y + -1y

Combine like terms: 2y + -1y = 1y
3 + 1y = 21 + y + -1y

Combine like terms: y + -1y = 0
3 + 1y = 21 + 0
3 + 1y = 21

Add '-3' to each side of the equation.
3 + -3 + 1y = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 1y = 21 + -3
1y = 21 + -3

Combine like terms: 21 + -3 = 18
1y = 18

Divide each side by '1'.
y = 18

Simplifying
y = 18

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