4x-9=12x+15

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Solution for 4x-9=12x+15 equation:


Simplifying
4x + -9 = 12x + 15

Reorder the terms:
-9 + 4x = 12x + 15

Reorder the terms:
-9 + 4x = 15 + 12x

Solving
-9 + 4x = 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.
-9 + 4x + -12x = 15 + 12x + -12x

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

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

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

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

Combine like terms: 15 + 9 = 24
-8x = 24

Divide each side by '-8'.
x = -3

Simplifying
x = -3

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