2x+3x+4x=81

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Solution for 2x+3x+4x=81 equation: 


Simplifying
2x + 3x + 4x = 81

Combine like terms: 2x + 3x = 5x
5x + 4x = 81

Combine like terms: 5x + 4x = 9x
9x = 81

Solving
9x = 81

Solving for variable 'x'.

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

Divide each side by '9'.
x = 9

Simplifying
x = 9

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