81=x-18

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Solution for 81=x-18 equation:


Simplifying
81 = x + -18

Reorder the terms:
81 = -18 + x

Solving
81 = -18 + 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.
81 + -1x = -18 + x + -1x

Combine like terms: x + -1x = 0
81 + -1x = -18 + 0
81 + -1x = -18

Add '-81' to each side of the equation.
81 + -81 + -1x = -18 + -81

Combine like terms: 81 + -81 = 0
0 + -1x = -18 + -81
-1x = -18 + -81

Combine like terms: -18 + -81 = -99
-1x = -99

Divide each side by '-1'.
x = 99

Simplifying
x = 99

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