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3\left(-36\right)+3x\times \frac{1}{3}=-3x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 3x, the least common multiple of x,3.
-108+3x\times \frac{1}{3}=-3x
Multiply 3 and -36 to get -108.
-108+x=-3x
Cancel out 3 and 3.
-108+x+3x=0
Add 3x to both sides.
-108+4x=0
Combine x and 3x to get 4x.
4x=108
Add 108 to both sides. Anything plus zero gives itself.
x=\frac{108}{4}
Divide both sides by 4.
x=27
Divide 108 by 4 to get 27.