-21-2x=9-8

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Solution for -21-2x=9-8 equation: 


Simplifying
-21 + -2x = 9 + -8

Combine like terms: 9 + -8 = 1
-21 + -2x = 1

Solving
-21 + -2x = 1

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + -2x = 1 + 21

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

Combine like terms: 1 + 21 = 22
-2x = 22

Divide each side by '-2'.
x = -11

Simplifying
x = -11

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