3+12=9y+4-8y

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Solution for 3+12=9y+4-8y equation:


Simplifying
3 + 12 = 9y + 4 + -8y

Combine like terms: 3 + 12 = 15
15 = 9y + 4 + -8y

Reorder the terms:
15 = 4 + 9y + -8y

Combine like terms: 9y + -8y = 1y
15 = 4 + 1y

Solving
15 = 4 + 1y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
15 + -1y = 4 + 1y + -1y

Combine like terms: 1y + -1y = 0
15 + -1y = 4 + 0
15 + -1y = 4

Add '-15' to each side of the equation.
15 + -15 + -1y = 4 + -15

Combine like terms: 15 + -15 = 0
0 + -1y = 4 + -15
-1y = 4 + -15

Combine like terms: 4 + -15 = -11
-1y = -11

Divide each side by '-1'.
y = 11

Simplifying
y = 11

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