-3(x+6)=21

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Solution for -3(x+6)=21 equation: 


Simplifying
-3(x + 6) = 21

Reorder the terms:
-3(6 + x) = 21
(6 * -3 + x * -3) = 21
(-18 + -3x) = 21

Solving
-18 + -3x = 21

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + -3x = 21 + 18

Combine like terms: -18 + 18 = 0
0 + -3x = 21 + 18
-3x = 21 + 18

Combine like terms: 21 + 18 = 39
-3x = 39

Divide each side by '-3'.
x = -13

Simplifying
x = -13

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