40-x=x-2

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Solution for 40-x=x-2 equation:


Simplifying
40 + -1x = x + -2

Reorder the terms:
40 + -1x = -2 + x

Solving
40 + -1x = -2 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
40 + -1x + -1x = -2 + x + -1x

Combine like terms: -1x + -1x = -2x
40 + -2x = -2 + x + -1x

Combine like terms: x + -1x = 0
40 + -2x = -2 + 0
40 + -2x = -2

Add '-40' to each side of the equation.
40 + -40 + -2x = -2 + -40

Combine like terms: 40 + -40 = 0
0 + -2x = -2 + -40
-2x = -2 + -40

Combine like terms: -2 + -40 = -42
-2x = -42

Divide each side by '-2'.
x = 21

Simplifying
x = 21

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