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4x+20+3\left(x-1\right)=x-13
Use the distributive property to multiply 4 by x+5.
4x+20+3x-3=x-13
Use the distributive property to multiply 3 by x-1.
7x+20-3=x-13
Combine 4x and 3x to get 7x.
7x+17=x-13
Subtract 3 from 20 to get 17.
7x+17-x=-13
Subtract x from both sides.
6x+17=-13
Combine 7x and -x to get 6x.
6x=-13-17
Subtract 17 from both sides.
6x=-30
Subtract 17 from -13 to get -30.
x=\frac{-30}{6}
Divide both sides by 6.
x=-5
Divide -30 by 6 to get -5.