5=-2x+21

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Solution for 5=-2x+21 equation:


Simplifying
5 = -2x + 21

Reorder the terms:
5 = 21 + -2x

Solving
5 = 21 + -2x

Solving for variable 'x'.

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

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

Combine like terms: -2x + 2x = 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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