6x+9=18x-3x+81

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Solution for 6x+9=18x-3x+81 equation:


Simplifying
6x + 9 = 18x + -3x + 81

Reorder the terms:
9 + 6x = 18x + -3x + 81

Reorder the terms:
9 + 6x = 81 + 18x + -3x

Combine like terms: 18x + -3x = 15x
9 + 6x = 81 + 15x

Solving
9 + 6x = 81 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
9 + 6x + -15x = 81 + 15x + -15x

Combine like terms: 6x + -15x = -9x
9 + -9x = 81 + 15x + -15x

Combine like terms: 15x + -15x = 0
9 + -9x = 81 + 0
9 + -9x = 81

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

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

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

Divide each side by '-9'.
x = -8

Simplifying
x = -8

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