81=-9(x-8)

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Solution for 81=-9(x-8) equation:


Simplifying
81 = -9(x + -8)

Reorder the terms:
81 = -9(-8 + x)
81 = (-8 * -9 + x * -9)
81 = (72 + -9x)

Solving
81 = 72 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
81 + 9x = 72 + -9x + 9x

Combine like terms: -9x + 9x = 0
81 + 9x = 72 + 0
81 + 9x = 72

Add '-81' to each side of the equation.
81 + -81 + 9x = 72 + -81

Combine like terms: 81 + -81 = 0
0 + 9x = 72 + -81
9x = 72 + -81

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

Divide each side by '9'.
x = -1

Simplifying
x = -1

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