x+7x+4x=240

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Solution for x+7x+4x=240 equation: 


Simplifying
x + 7x + 4x = 240

Combine like terms: x + 7x = 8x
8x + 4x = 240

Combine like terms: 8x + 4x = 12x
12x = 240

Solving
12x = 240

Solving for variable 'x'.

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

Divide each side by '12'.
x = 20

Simplifying
x = 20

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