39=x-9+x+3(x-9)

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Solution for 39=x-9+x+3(x-9) equation:


Simplifying
39 = x + -9 + x + 3(x + -9)

Reorder the terms:
39 = x + -9 + x + 3(-9 + x)
39 = x + -9 + x + (-9 * 3 + x * 3)
39 = x + -9 + x + (-27 + 3x)

Reorder the terms:
39 = -9 + -27 + x + x + 3x

Combine like terms: -9 + -27 = -36
39 = -36 + x + x + 3x

Combine like terms: x + x = 2x
39 = -36 + 2x + 3x

Combine like terms: 2x + 3x = 5x
39 = -36 + 5x

Solving
39 = -36 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
39 + -5x = -36 + 5x + -5x

Combine like terms: 5x + -5x = 0
39 + -5x = -36 + 0
39 + -5x = -36

Add '-39' to each side of the equation.
39 + -39 + -5x = -36 + -39

Combine like terms: 39 + -39 = 0
0 + -5x = -36 + -39
-5x = -36 + -39

Combine like terms: -36 + -39 = -75
-5x = -75

Divide each side by '-5'.
x = 15

Simplifying
x = 15

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