Răspuns :
a)
a : 0 , 07 = 5
a = 5 × 0 , 07
a = 0 , 35
b)
b × 0 , 8 = 5 , 6
b = 5 , 6 : 0 , 8
b = 7
a : 0 , 07 = 5
a = 5 × 0 , 07
a = 0 , 35
b)
b × 0 , 8 = 5 , 6
b = 5 , 6 : 0 , 8
b = 7