1) x=-3/8:2/3=-3/8x3/2=-9/16
x=-9/16
2) x= 40,5 : (-9) = -4,5
x = -4,5
3) x = -32/63:8/21=-32/63×21/8=-4/3=-1 1/3
x= -1 1/3
4) x=-1,4x2/7=-0,4
x=-0,4
