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x-15=\left(-x-2\right)\times 2
Subtract 2 from -13 to get -15.
x-15=2\left(-x\right)-4
Use the distributive property to multiply -x-2 by 2.
x-15-2\left(-x\right)=-4
Subtract 2\left(-x\right) from both sides.
x-15-2\left(-1\right)x=-4
Multiply -1 and 2 to get -2.
x-15+2x=-4
Multiply -2 and -1 to get 2.
3x-15=-4
Combine x and 2x to get 3x.
3x=-4+15
Add 15 to both sides.
3x=11
Add -4 and 15 to get 11.
x=\frac{11}{3}
Divide both sides by 3.