5=21-x

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Solution for 5=21-x equation:


Simplifying
5 = 21 + -1x

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

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

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

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

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

Simplifying
x = 16

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