12+9y=15

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Solution for 12+9y=15 equation: 


Simplifying
12 + 9y = 15

Solving
12 + 9y = 15

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 + 9y = 15 + -12

Combine like terms: 12 + -12 = 0
0 + 9y = 15 + -12
9y = 15 + -12

Combine like terms: 15 + -12 = 3
9y = 3

Divide each side by '9'.
y = 0.3333333333

Simplifying
y = 0.3333333333

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