-3(x+5)=-21-x

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Solution for -3(x+5)=-21-x equation:


Simplifying
-3(x + 5) = -21 + -1x

Reorder the terms:
-3(5 + x) = -21 + -1x
(5 * -3 + x * -3) = -21 + -1x
(-15 + -3x) = -21 + -1x

Solving
-15 + -3x = -21 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-15 + -3x + x = -21 + -1x + x

Combine like terms: -3x + x = -2x
-15 + -2x = -21 + -1x + x

Combine like terms: -1x + x = 0
-15 + -2x = -21 + 0
-15 + -2x = -21

Add '15' to each side of the equation.
-15 + 15 + -2x = -21 + 15

Combine like terms: -15 + 15 = 0
0 + -2x = -21 + 15
-2x = -21 + 15

Combine like terms: -21 + 15 = -6
-2x = -6

Divide each side by '-2'.
x = 3

Simplifying
x = 3

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