-2x-3=21

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Solution for -2x-3=21 equation: 


Simplifying
-2x + -3 = 21

Reorder the terms:
-3 + -2x = 21

Solving
-3 + -2x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + -2x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + -2x = 21 + 3
-2x = 21 + 3

Combine like terms: 21 + 3 = 24
-2x = 24

Divide each side by '-2'.
x = -12

Simplifying
x = -12

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