6x+3x+x=840

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Solution for 6x+3x+x=840 equation: 


Simplifying
6x + 3x + x = 840

Combine like terms: 6x + 3x = 9x
9x + x = 840

Combine like terms: 9x + x = 10x
10x = 840

Solving
10x = 840

Solving for variable 'x'.

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

Divide each side by '10'.
x = 84

Simplifying
x = 84

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