-12=15-3y

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Solution for -12=15-3y equation:


Simplifying
-12 = 15 + -3y

Solving
-12 = 15 + -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
-12 + 3y = 15 + -3y + 3y

Combine like terms: -3y + 3y = 0
-12 + 3y = 15 + 0
-12 + 3y = 15

Add '12' to each side of the equation.
-12 + 12 + 3y = 15 + 12

Combine like terms: -12 + 12 = 0
0 + 3y = 15 + 12
3y = 15 + 12

Combine like terms: 15 + 12 = 27
3y = 27

Divide each side by '3'.
y = 9

Simplifying
y = 9

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