12x-21=30x+15-6x

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Solution for 12x-21=30x+15-6x equation:


Simplifying
12x + -21 = 30x + 15 + -6x

Reorder the terms:
-21 + 12x = 30x + 15 + -6x

Reorder the terms:
-21 + 12x = 15 + 30x + -6x

Combine like terms: 30x + -6x = 24x
-21 + 12x = 15 + 24x

Solving
-21 + 12x = 15 + 24x

Solving for variable 'x'.

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

Add '-24x' to each side of the equation.
-21 + 12x + -24x = 15 + 24x + -24x

Combine like terms: 12x + -24x = -12x
-21 + -12x = 15 + 24x + -24x

Combine like terms: 24x + -24x = 0
-21 + -12x = 15 + 0
-21 + -12x = 15

Add '21' to each side of the equation.
-21 + 21 + -12x = 15 + 21

Combine like terms: -21 + 21 = 0
0 + -12x = 15 + 21
-12x = 15 + 21

Combine like terms: 15 + 21 = 36
-12x = 36

Divide each side by '-12'.
x = -3

Simplifying
x = -3

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