12x+9=3x+15

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


Simplifying
12x + 9 = 3x + 15

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

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

Solving
9 + 12x = 15 + 3x

Solving for variable 'x'.

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

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

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

Combine like terms: 3x + -3x = 0
9 + 9x = 15 + 0
9 + 9x = 15

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

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

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

Divide each side by '9'.
x = 0.6666666667

Simplifying
x = 0.6666666667

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