wieslawlozickip5w1nd

3x/(x-4) –(x+8)/(x-4)=  (3x-x-8)/(x-4) = (2x-8)/(x-4) =2(x-4)/x-4) = 2

4x/(x+1)  -  (x-3)/(x+1)=  (4x-x+3)/(x+1) =3(x+1)/(x+1) =  3