15+2y=3-y

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Solution for 15+2y=3-y equation:


Simplifying
15 + 2y = 3 + -1y

Solving
15 + 2y = 3 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
15 + 2y + y = 3 + -1y + y

Combine like terms: 2y + y = 3y
15 + 3y = 3 + -1y + y

Combine like terms: -1y + y = 0
15 + 3y = 3 + 0
15 + 3y = 3

Add '-15' to each side of the equation.
15 + -15 + 3y = 3 + -15

Combine like terms: 15 + -15 = 0
0 + 3y = 3 + -15
3y = 3 + -15

Combine like terms: 3 + -15 = -12
3y = -12

Divide each side by '3'.
y = -4

Simplifying
y = -4

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