3x+15=-9x-20

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Solution for 3x+15=-9x-20 equation:


Simplifying
3x + 15 = -9x + -20

Reorder the terms:
15 + 3x = -9x + -20

Reorder the terms:
15 + 3x = -20 + -9x

Solving
15 + 3x = -20 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
15 + 3x + 9x = -20 + -9x + 9x

Combine like terms: 3x + 9x = 12x
15 + 12x = -20 + -9x + 9x

Combine like terms: -9x + 9x = 0
15 + 12x = -20 + 0
15 + 12x = -20

Add '-15' to each side of the equation.
15 + -15 + 12x = -20 + -15

Combine like terms: 15 + -15 = 0
0 + 12x = -20 + -15
12x = -20 + -15

Combine like terms: -20 + -15 = -35
12x = -35

Divide each side by '12'.
x = -2.916666667

Simplifying
x = -2.916666667

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