Răspuns :
a) 3/5×a=60
3a/5=60
3a=60×5
3a=300
a=300:3
a=100
b) 3/5×a=3/8
3a/5=3/8
3a×8=5×3
8a=5
a=5/8
c) 3/5×a=5250
3a/5=5250
3a=5250×5
3a=26250
a=26250:3
a=8750
a) 3/5×b=60
3 b/5=60
3 b=60×5
3 b=300
b=300:3
b=100
b) 3/5×b=3/8
3 b/5=3/8
3 b×8=5×3
8 b=5
b=5/8
c) 3/5×b=5250
3 b/5=5250
3 b=5250×5
3 b=26250
b=26250:3
b=8750