解:(1)去括号得,3-3x>2-4x,移项得,-3x+4x>2-3,合并同类项得,x>-1;(2){1+x2≤1+2x3+1①2x>3(x-1)②,由①得,x≥-5,由②得,x<3,所以,不等式组的解集是-5≤x<3.