-15=-3y-9y

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Solution for -15=-3y-9y equation:


Simplifying
-15 = -3y + -9y

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

Solving
-15 = -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 + 12y = -12y + 12y

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

Add '15' to each side of the equation.
-15 + 15 + 12y = 0 + 15

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

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

Divide each side by '12'.
y = 1.25

Simplifying
y = 1.25

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