18y+9=6y-15

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Solution for 18y+9=6y-15 equation:


Simplifying
18y + 9 = 6y + -15

Reorder the terms:
9 + 18y = 6y + -15

Reorder the terms:
9 + 18y = -15 + 6y

Solving
9 + 18y = -15 + 6y

Solving for variable 'y'.

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

Add '-6y' to each side of the equation.
9 + 18y + -6y = -15 + 6y + -6y

Combine like terms: 18y + -6y = 12y
9 + 12y = -15 + 6y + -6y

Combine like terms: 6y + -6y = 0
9 + 12y = -15 + 0
9 + 12y = -15

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

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

Combine like terms: -15 + -9 = -24
12y = -24

Divide each side by '12'.
y = -2

Simplifying
y = -2

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