9-15-9=12x

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Solution for 9-15-9=12x equation:


Simplifying
9 + -15 + -9 = 12x

Combine like terms: 9 + -15 = -6
-6 + -9 = 12x

Combine like terms: -6 + -9 = -15
-15 = 12x

Solving
-15 = 12x

Solving for variable 'x'.

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

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

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

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

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

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

Divide each side by '-12'.
x = -1.25

Simplifying
x = -1.25

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