4+y+2=21-2y

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Solution for 4+y+2=21-2y equation:


Simplifying
4 + y + 2 = 21 + -2y

Reorder the terms:
4 + 2 + y = 21 + -2y

Combine like terms: 4 + 2 = 6
6 + y = 21 + -2y

Solving
6 + y = 21 + -2y

Solving for variable 'y'.

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

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

Combine like terms: y + 2y = 3y
6 + 3y = 21 + -2y + 2y

Combine like terms: -2y + 2y = 0
6 + 3y = 21 + 0
6 + 3y = 21

Add '-6' to each side of the equation.
6 + -6 + 3y = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 3y = 21 + -6
3y = 21 + -6

Combine like terms: 21 + -6 = 15
3y = 15

Divide each side by '3'.
y = 5

Simplifying
y = 5

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