3x+x+6=-5x-21

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Solution for 3x+x+6=-5x-21 equation:


Simplifying
3x + x + 6 = -5x + -21

Reorder the terms:
6 + 3x + x = -5x + -21

Combine like terms: 3x + x = 4x
6 + 4x = -5x + -21

Reorder the terms:
6 + 4x = -21 + -5x

Solving
6 + 4x = -21 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
6 + 4x + 5x = -21 + -5x + 5x

Combine like terms: 4x + 5x = 9x
6 + 9x = -21 + -5x + 5x

Combine like terms: -5x + 5x = 0
6 + 9x = -21 + 0
6 + 9x = -21

Add '-6' to each side of the equation.
6 + -6 + 9x = -21 + -6

Combine like terms: 6 + -6 = 0
0 + 9x = -21 + -6
9x = -21 + -6

Combine like terms: -21 + -6 = -27
9x = -27

Divide each side by '9'.
x = -3

Simplifying
x = -3

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