7(3-x)=-21

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Solution for 7(3-x)=-21 equation: 


Simplifying
7(3 + -1x) = -21
(3 * 7 + -1x * 7) = -21
(21 + -7x) = -21

Solving
21 + -7x = -21

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 + -7x = -21 + -21

Combine like terms: 21 + -21 = 0
0 + -7x = -21 + -21
-7x = -21 + -21

Combine like terms: -21 + -21 = -42
-7x = -42

Divide each side by '-7'.
x = 6

Simplifying
x = 6

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