5+3x=x+21

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Solution for 5+3x=x+21 equation:


Simplifying
5 + 3x = x + 21

Reorder the terms:
5 + 3x = 21 + x

Solving
5 + 3x = 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.
5 + 3x + -1x = 21 + x + -1x

Combine like terms: 3x + -1x = 2x
5 + 2x = 21 + x + -1x

Combine like terms: x + -1x = 0
5 + 2x = 21 + 0
5 + 2x = 21

Add '-5' to each side of the equation.
5 + -5 + 2x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 2x = 21 + -5
2x = 21 + -5

Combine like terms: 21 + -5 = 16
2x = 16

Divide each side by '2'.
x = 8

Simplifying
x = 8

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