Solve for x
x=-3
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x+3\left(-x\right)=2x-x+9
Combine 2x and -x to get x.
x+3\left(-x\right)=x+9
Combine 2x and -x to get x.
x+3\left(-x\right)-x=9
Subtract x from both sides.
3\left(-x\right)=9
Combine x and -x to get 0.
-x=\frac{9}{3}
Divide both sides by 3.
-x=3
Divide 9 by 3 to get 3.
x=-3
Multiply both sides by -1.
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