-(-7x)=(-21)

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Solution for -(-7x)=(-21) equation: 


Simplifying
-1(-7x) = (-21)

Remove parenthesis around (-7x)
-1 * -7x = (-21)

Multiply -1 * -7
7x = (-21)
7x = -21

Solving
7x = -21

Solving for variable 'x'.

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

Divide each side by '7'.
x = -3

Simplifying
x = -3

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