3x+15+2x=-4x-21

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Solution for 3x+15+2x=-4x-21 equation:


Simplifying
3x + 15 + 2x = -4x + -21

Reorder the terms:
15 + 3x + 2x = -4x + -21

Combine like terms: 3x + 2x = 5x
15 + 5x = -4x + -21

Reorder the terms:
15 + 5x = -21 + -4x

Solving
15 + 5x = -21 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
15 + 5x + 4x = -21 + -4x + 4x

Combine like terms: 5x + 4x = 9x
15 + 9x = -21 + -4x + 4x

Combine like terms: -4x + 4x = 0
15 + 9x = -21 + 0
15 + 9x = -21

Add '-15' to each side of the equation.
15 + -15 + 9x = -21 + -15

Combine like terms: 15 + -15 = 0
0 + 9x = -21 + -15
9x = -21 + -15

Combine like terms: -21 + -15 = -36
9x = -36

Divide each side by '9'.
x = -4

Simplifying
x = -4

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