81-7x=20x+18

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Solution for 81-7x=20x+18 equation:


Simplifying
81 + -7x = 20x + 18

Reorder the terms:
81 + -7x = 18 + 20x

Solving
81 + -7x = 18 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
81 + -7x + -20x = 18 + 20x + -20x

Combine like terms: -7x + -20x = -27x
81 + -27x = 18 + 20x + -20x

Combine like terms: 20x + -20x = 0
81 + -27x = 18 + 0
81 + -27x = 18

Add '-81' to each side of the equation.
81 + -81 + -27x = 18 + -81

Combine like terms: 81 + -81 = 0
0 + -27x = 18 + -81
-27x = 18 + -81

Combine like terms: 18 + -81 = -63
-27x = -63

Divide each side by '-27'.
x = 2.333333333

Simplifying
x = 2.333333333

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