5-x-x=-21

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Solution for 5-x-x=-21 equation:


Simplifying
5 + -1x + -1x = -21

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

Solving
5 + -2x = -21

Solving for variable 'x'.

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

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 = -26
-2x = -26

Divide each side by '-2'.
x = 13

Simplifying
x = 13

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