6x=21-x

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Solution for 6x=21-x equation: 


Simplifying
6x = 21 + -1x

Solving
6x = 21 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
6x + x = 21 + -1x + x

Combine like terms: 6x + x = 7x
7x = 21 + -1x + x

Combine like terms: -1x + x = 0
7x = 21 + 0
7x = 21

Divide each side by '7'.
x = 3

Simplifying
x = 3

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