126=3x+3(12+x)

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Solution for 126=3x+3(12+x) equation:


Simplifying
126 = 3x + 3(12 + x)
126 = 3x + (12 * 3 + x * 3)
126 = 3x + (36 + 3x)

Reorder the terms:
126 = 36 + 3x + 3x

Combine like terms: 3x + 3x = 6x
126 = 36 + 6x

Solving
126 = 36 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
126 + -6x = 36 + 6x + -6x

Combine like terms: 6x + -6x = 0
126 + -6x = 36 + 0
126 + -6x = 36

Add '-126' to each side of the equation.
126 + -126 + -6x = 36 + -126

Combine like terms: 126 + -126 = 0
0 + -6x = 36 + -126
-6x = 36 + -126

Combine like terms: 36 + -126 = -90
-6x = -90

Divide each side by '-6'.
x = 15

Simplifying
x = 15

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