a) 2/3•x=10/21 |:2/3
x=5/7
b) x•4/7=4/35 |:4/7
x=1/5
c) 2/5•x=2 |:2/5
x= 5
d) x•3/7=1 |:3/7
x= 2 i 1/3
e) 3/4•x=6 |:3/4
x= 8
f) x•3/8=1/8 |:3/8
x= 1/3
