-2(x+3)=21

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Solution for -2(x+3)=21 equation: 


Simplifying
-2(x + 3) = 21

Reorder the terms:
-2(3 + x) = 21
(3 * -2 + x * -2) = 21
(-6 + -2x) = 21

Solving
-6 + -2x = 21

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + -2x = 21 + 6

Combine like terms: -6 + 6 = 0
0 + -2x = 21 + 6
-2x = 21 + 6

Combine like terms: 21 + 6 = 27
-2x = 27

Divide each side by '-2'.
x = -13.5

Simplifying
x = -13.5

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