-2x+42=-138+7x

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Solution for -2x+42=-138+7x equation:


Simplifying
-2x + 42 = -138 + 7x

Reorder the terms:
42 + -2x = -138 + 7x

Solving
42 + -2x = -138 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
42 + -2x + -7x = -138 + 7x + -7x

Combine like terms: -2x + -7x = -9x
42 + -9x = -138 + 7x + -7x

Combine like terms: 7x + -7x = 0
42 + -9x = -138 + 0
42 + -9x = -138

Add '-42' to each side of the equation.
42 + -42 + -9x = -138 + -42

Combine like terms: 42 + -42 = 0
0 + -9x = -138 + -42
-9x = -138 + -42

Combine like terms: -138 + -42 = -180
-9x = -180

Divide each side by '-9'.
x = 20

Simplifying
x = 20

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