(72-x)=(81-2x)

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Solution for (72-x)=(81-2x) equation:


Simplifying
(72 + -1x) = (81 + -2x)

Remove parenthesis around (72 + -1x)
72 + -1x = (81 + -2x)

Remove parenthesis around (81 + -2x)
72 + -1x = 81 + -2x

Solving
72 + -1x = 81 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
72 + -1x + 2x = 81 + -2x + 2x

Combine like terms: -1x + 2x = 1x
72 + 1x = 81 + -2x + 2x

Combine like terms: -2x + 2x = 0
72 + 1x = 81 + 0
72 + 1x = 81

Add '-72' to each side of the equation.
72 + -72 + 1x = 81 + -72

Combine like terms: 72 + -72 = 0
0 + 1x = 81 + -72
1x = 81 + -72

Combine like terms: 81 + -72 = 9
1x = 9

Divide each side by '1'.
x = 9

Simplifying
x = 9

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