7(-x)=21

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Solution for 7(-x)=21 equation: 


Simplifying
7(-1x) = 21

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

Multiply 7 * -1
-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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