8x=21+x

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Solution for 8x=21+x equation: 


Simplifying
8x = 21 + x

Solving
8x = 21 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
8x + -1x = 21 + x + -1x

Combine like terms: 8x + -1x = 7x
7x = 21 + x + -1x

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

Divide each side by '7'.
x = 3

Simplifying
x = 3

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