-2x-1=-21

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Solution for -2x-1=-21 equation: 


Simplifying
-2x + -1 = -21

Reorder the terms:
-1 + -2x = -21

Solving
-1 + -2x = -21

Solving for variable 'x'.

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

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

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

Combine like terms: -21 + 1 = -20
-2x = -20

Divide each side by '-2'.
x = 10

Simplifying
x = 10

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