7x=x+21

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Solution for 7x=x+21 equation: 


Simplifying
7x = x + 21

Reorder the terms:
7x = 21 + x

Solving
7x = 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.
7x + -1x = 21 + x + -1x

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

Combine like terms: x + -1x = 0
6x = 21 + 0
6x = 21

Divide each side by '6'.
x = 3.5

Simplifying
x = 3.5

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