20=-3x-9x

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


Simplifying
20 = -3x + -9x

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

Solving
20 = -12x

Solving for variable 'x'.

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

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

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

Add '-20' to each side of the equation.
20 + -20 + 12x = 0 + -20

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

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

Divide each side by '12'.
x = -1.666666667

Simplifying
x = -1.666666667

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