-(3+x)=21

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


Simplifying
-1(3 + x) = 21
(3 * -1 + x * -1) = 21
(-3 + -1x) = 21

Solving
-3 + -1x = 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 + -1x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + -1x = 21 + 3
-1x = 21 + 3

Combine like terms: 21 + 3 = 24
-1x = 24

Divide each side by '-1'.
x = -24

Simplifying
x = -24

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