1.2x+19=3^3,x=4,√吵困庆(3X+4)=42.(1)12-3x^3=-17/9,27x^3=125,x=5/3(2)(x-2)^3+64=0,(x-2)^3=-4^3,x-2=-4,x=-2(3)2(x-1/升握2)^3=1/4,(x-1/尺橘2)^3=(1/2)^3,x-1/2=1/2,x=1
1. 42.(1) 5/3(2) 6(3) 1