3x+12=15x-9

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Solution for 3x+12=15x-9 equation:


Simplifying
3x + 12 = 15x + -9

Reorder the terms:
12 + 3x = 15x + -9

Reorder the terms:
12 + 3x = -9 + 15x

Solving
12 + 3x = -9 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
12 + 3x + -15x = -9 + 15x + -15x

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

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

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

Combine like terms: 12 + -12 = 0
0 + -12x = -9 + -12
-12x = -9 + -12

Combine like terms: -9 + -12 = -21
-12x = -21

Divide each side by '-12'.
x = 1.75

Simplifying
x = 1.75

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