81-3x=9x+12

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Solution for 81-3x=9x+12 equation:


Simplifying
81 + -3x = 9x + 12

Reorder the terms:
81 + -3x = 12 + 9x

Solving
81 + -3x = 12 + 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 + -3x + -9x = 12 + 9x + -9x

Combine like terms: -3x + -9x = -12x
81 + -12x = 12 + 9x + -9x

Combine like terms: 9x + -9x = 0
81 + -12x = 12 + 0
81 + -12x = 12

Add '-81' to each side of the equation.
81 + -81 + -12x = 12 + -81

Combine like terms: 81 + -81 = 0
0 + -12x = 12 + -81
-12x = 12 + -81

Combine like terms: 12 + -81 = -69
-12x = -69

Divide each side by '-12'.
x = 5.75

Simplifying
x = 5.75

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