-x+9=81-7x

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Solution for -x+9=81-7x equation:


Simplifying
-1x + 9 = 81 + -7x

Reorder the terms:
9 + -1x = 81 + -7x

Solving
9 + -1x = 81 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
9 + -1x + 7x = 81 + -7x + 7x

Combine like terms: -1x + 7x = 6x
9 + 6x = 81 + -7x + 7x

Combine like terms: -7x + 7x = 0
9 + 6x = 81 + 0
9 + 6x = 81

Add '-9' to each side of the equation.
9 + -9 + 6x = 81 + -9

Combine like terms: 9 + -9 = 0
0 + 6x = 81 + -9
6x = 81 + -9

Combine like terms: 81 + -9 = 72
6x = 72

Divide each side by '6'.
x = 12

Simplifying
x = 12

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