x-[-21]=-3

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Solution for x-[-21]=-3 equation: 


Simplifying
x + -1[-21] = -3

Multiply -1 * -21
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 = -24
x = -24

Simplifying
x = -24

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