5=21-3x

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Solution for 5=21-3x equation:


Simplifying
5 = 21 + -3x

Solving
5 = 21 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
5 + 3x = 21 + -3x + 3x

Combine like terms: -3x + 3x = 0
5 + 3x = 21 + 0
5 + 3x = 21

Add '-5' to each side of the equation.
5 + -5 + 3x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 3x = 21 + -5
3x = 21 + -5

Combine like terms: 21 + -5 = 16
3x = 16

Divide each side by '3'.
x = 5.333333333

Simplifying
x = 5.333333333

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