3x+12x=81

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Solution for 3x+12x=81 equation: 


Simplifying
3x + 12x = 81

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

Solving
15x = 81

Solving for variable 'x'.

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

Divide each side by '15'.
x = 5.4

Simplifying
x = 5.4

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