15-4y=9-12y

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Solution for 15-4y=9-12y equation:


Simplifying
15 + -4y = 9 + -12y

Solving
15 + -4y = 9 + -12y

Solving for variable 'y'.

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

Add '12y' to each side of the equation.
15 + -4y + 12y = 9 + -12y + 12y

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

Combine like terms: -12y + 12y = 0
15 + 8y = 9 + 0
15 + 8y = 9

Add '-15' to each side of the equation.
15 + -15 + 8y = 9 + -15

Combine like terms: 15 + -15 = 0
0 + 8y = 9 + -15
8y = 9 + -15

Combine like terms: 9 + -15 = -6
8y = -6

Divide each side by '8'.
y = -0.75

Simplifying
y = -0.75

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