x-2x+4=81

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Solution for x-2x+4=81 equation:


Simplifying
x + -2x + 4 = 81

Reorder the terms:
4 + x + -2x = 81

Combine like terms: x + -2x = -1x
4 + -1x = 81

Solving
4 + -1x = 81

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + -1x = 81 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 81 + -4
-1x = 81 + -4

Combine like terms: 81 + -4 = 77
-1x = 77

Divide each side by '-1'.
x = -77

Simplifying
x = -77

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