12x-15=4x+9

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


Simplifying
12x + -15 = 4x + 9

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

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

Solving
-15 + 12x = 9 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-15 + 12x + -4x = 9 + 4x + -4x

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

Combine like terms: 4x + -4x = 0
-15 + 8x = 9 + 0
-15 + 8x = 9

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

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

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

Divide each side by '8'.
x = 3

Simplifying
x = 3

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