x+6=21+15+3x

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Solution for x+6=21+15+3x equation:


Simplifying
x + 6 = 21 + 15 + 3x

Reorder the terms:
6 + x = 21 + 15 + 3x

Combine like terms: 21 + 15 = 36
6 + x = 36 + 3x

Solving
6 + x = 36 + 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.
6 + x + -3x = 36 + 3x + -3x

Combine like terms: x + -3x = -2x
6 + -2x = 36 + 3x + -3x

Combine like terms: 3x + -3x = 0
6 + -2x = 36 + 0
6 + -2x = 36

Add '-6' to each side of the equation.
6 + -6 + -2x = 36 + -6

Combine like terms: 6 + -6 = 0
0 + -2x = 36 + -6
-2x = 36 + -6

Combine like terms: 36 + -6 = 30
-2x = 30

Divide each side by '-2'.
x = -15

Simplifying
x = -15

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