12+3y=9

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Solution for 12+3y=9 equation: 


Simplifying
12 + 3y = 9

Solving
12 + 3y = 9

Solving for variable 'y'.

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

Add '-12' to each side of the equation.
12 + -12 + 3y = 9 + -12

Combine like terms: 12 + -12 = 0
0 + 3y = 9 + -12
3y = 9 + -12

Combine like terms: 9 + -12 = -3
3y = -3

Divide each side by '3'.
y = -1

Simplifying
y = -1

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