3x+5=(-x-21)

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


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

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

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

Remove parenthesis around (-21 + -1x)
5 + 3x = -21 + -1x

Solving
5 + 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.
5 + 3x + x = -21 + -1x + x

Combine like terms: 3x + x = 4x
5 + 4x = -21 + -1x + x

Combine like terms: -1x + x = 0
5 + 4x = -21 + 0
5 + 4x = -21

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

Combine like terms: 5 + -5 = 0
0 + 4x = -21 + -5
4x = -21 + -5

Combine like terms: -21 + -5 = -26
4x = -26

Divide each side by '4'.
x = -6.5

Simplifying
x = -6.5

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