5x+21=-2x-x

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Solution for 5x+21=-2x-x equation:


Simplifying
5x + 21 = -2x + -1x

Reorder the terms:
21 + 5x = -2x + -1x

Combine like terms: -2x + -1x = -3x
21 + 5x = -3x

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

Combine like terms: 5x + 3x = 8x
21 + 8x = -3x + 3x

Combine like terms: -3x + 3x = 0
21 + 8x = 0

Add '-21' to each side of the equation.
21 + -21 + 8x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 8x = 0 + -21
8x = 0 + -21

Combine like terms: 0 + -21 = -21
8x = -21

Divide each side by '8'.
x = -2.625

Simplifying
x = -2.625

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