81-2x-x-3=x

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Solution for 81-2x-x-3=x equation:


Simplifying
81 + -2x + -1x + -3 = x

Reorder the terms:
81 + -3 + -2x + -1x = x

Combine like terms: 81 + -3 = 78
78 + -2x + -1x = x

Combine like terms: -2x + -1x = -3x
78 + -3x = x

Solving
78 + -3x = 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.
78 + -3x + -1x = x + -1x

Combine like terms: -3x + -1x = -4x
78 + -4x = x + -1x

Combine like terms: x + -1x = 0
78 + -4x = 0

Add '-78' to each side of the equation.
78 + -78 + -4x = 0 + -78

Combine like terms: 78 + -78 = 0
0 + -4x = 0 + -78
-4x = 0 + -78

Combine like terms: 0 + -78 = -78
-4x = -78

Divide each side by '-4'.
x = 19.5

Simplifying
x = 19.5

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