x+(-21)=-3

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Solution for x+(-21)=-3 equation: 


Simplifying
x + (-21) = -3
x + -21 = -3

Reorder the terms:
-21 + x = -3

Solving
-21 + x = -3

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 + x = -3 + 21

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

Combine like terms: -3 + 21 = 18
x = 18

Simplifying
x = 18

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