3x+6(2x-9)=81

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Solution for 3x+6(2x-9)=81 equation:


Simplifying
3x + 6(2x + -9) = 81

Reorder the terms:
3x + 6(-9 + 2x) = 81
3x + (-9 * 6 + 2x * 6) = 81
3x + (-54 + 12x) = 81

Reorder the terms:
-54 + 3x + 12x = 81

Combine like terms: 3x + 12x = 15x
-54 + 15x = 81

Solving
-54 + 15x = 81

Solving for variable 'x'.

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

Add '54' to each side of the equation.
-54 + 54 + 15x = 81 + 54

Combine like terms: -54 + 54 = 0
0 + 15x = 81 + 54
15x = 81 + 54

Combine like terms: 81 + 54 = 135
15x = 135

Divide each side by '15'.
x = 9

Simplifying
x = 9

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