42=18-x

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Solution for 42=18-x equation:


Simplifying
42 = 18 + -1x

Solving
42 = 18 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
42 + x = 18 + -1x + x

Combine like terms: -1x + x = 0
42 + x = 18 + 0
42 + x = 18

Add '-42' to each side of the equation.
42 + -42 + x = 18 + -42

Combine like terms: 42 + -42 = 0
0 + x = 18 + -42
x = 18 + -42

Combine like terms: 18 + -42 = -24
x = -24

Simplifying
x = -24

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