54-(3x+15)=3(x+6)+x

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Solution for 54-(3x+15)=3(x+6)+x equation:


Simplifying
54 + -1(3x + 15) = 3(x + 6) + x

Reorder the terms:
54 + -1(15 + 3x) = 3(x + 6) + x
54 + (15 * -1 + 3x * -1) = 3(x + 6) + x
54 + (-15 + -3x) = 3(x + 6) + x

Combine like terms: 54 + -15 = 39
39 + -3x = 3(x + 6) + x

Reorder the terms:
39 + -3x = 3(6 + x) + x
39 + -3x = (6 * 3 + x * 3) + x
39 + -3x = (18 + 3x) + x

Combine like terms: 3x + x = 4x
39 + -3x = 18 + 4x

Solving
39 + -3x = 18 + 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.
39 + -3x + -4x = 18 + 4x + -4x

Combine like terms: -3x + -4x = -7x
39 + -7x = 18 + 4x + -4x

Combine like terms: 4x + -4x = 0
39 + -7x = 18 + 0
39 + -7x = 18

Add '-39' to each side of the equation.
39 + -39 + -7x = 18 + -39

Combine like terms: 39 + -39 = 0
0 + -7x = 18 + -39
-7x = 18 + -39

Combine like terms: 18 + -39 = -21
-7x = -21

Divide each side by '-7'.
x = 3

Simplifying
x = 3

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