6x+x+3x=20

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Solution for 6x+x+3x=20 equation: 


Simplifying
6x + x + 3x = 20

Combine like terms: 6x + x = 7x
7x + 3x = 20

Combine like terms: 7x + 3x = 10x
10x = 20

Solving
10x = 20

Solving for variable 'x'.

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

Divide each side by '10'.
x = 2

Simplifying
x = 2

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