-x-x+42=0

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Solution for -x-x+42=0 equation:


Simplifying
-1x + -1x + 42 = 0

Reorder the terms:
42 + -1x + -1x = 0

Combine like terms: -1x + -1x = -2x
42 + -2x = 0

Solving
42 + -2x = 0

Solving for variable 'x'.

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

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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