12x-42=2x+8x

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Solution for 12x-42=2x+8x equation:


Simplifying
12x + -42 = 2x + 8x

Reorder the terms:
-42 + 12x = 2x + 8x

Combine like terms: 2x + 8x = 10x
-42 + 12x = 10x

Solving
-42 + 12x = 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
-42 + 12x + -10x = 10x + -10x

Combine like terms: 12x + -10x = 2x
-42 + 2x = 10x + -10x

Combine like terms: 10x + -10x = 0
-42 + 2x = 0

Add '42' to each side of the equation.
-42 + 42 + 2x = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 2x = 0 + 42
2x = 0 + 42

Combine like terms: 0 + 42 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21

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