Răspuns:
Explicație pas cu pas:
[7/5 : 14/15 + 3/2 : (9/4 - 3/2)]*2/7
= [7/5 * 15/14 + 3/2 : (9/4 - 6/4)]*2/7
= (3/2 + 3/2 : 3/4) *2/7
= (3/2 + 3/2 * 4/3)*2/7
= (3/2 + 2)*2/7
= (3/2 + 4/2)*2/7
= 7/2*2/7
= 1
