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

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


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

Reorder the terms:
3(3 + x) + 21 = -3x
(3 * 3 + x * 3) + 21 = -3x
(9 + 3x) + 21 = -3x

Reorder the terms:
9 + 21 + 3x = -3x

Combine like terms: 9 + 21 = 30
30 + 3x = -3x

Solving
30 + 3x = -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
30 + 3x + 3x = -3x + 3x

Combine like terms: 3x + 3x = 6x
30 + 6x = -3x + 3x

Combine like terms: -3x + 3x = 0
30 + 6x = 0

Add '-30' to each side of the equation.
30 + -30 + 6x = 0 + -30

Combine like terms: 30 + -30 = 0
0 + 6x = 0 + -30
6x = 0 + -30

Combine like terms: 0 + -30 = -30
6x = -30

Divide each side by '6'.
x = -5

Simplifying
x = -5

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