3x+4=-2x-21

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Solution for 3x+4=-2x-21 equation:


Simplifying
3x + 4 = -2x + -21

Reorder the terms:
4 + 3x = -2x + -21

Reorder the terms:
4 + 3x = -21 + -2x

Solving
4 + 3x = -21 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
4 + 3x + 2x = -21 + -2x + 2x

Combine like terms: 3x + 2x = 5x
4 + 5x = -21 + -2x + 2x

Combine like terms: -2x + 2x = 0
4 + 5x = -21 + 0
4 + 5x = -21

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

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

Combine like terms: -21 + -4 = -25
5x = -25

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

Simplifying
x = -5

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