Respuesta :

4*3 = 12
36-12= 24
24/(9/3)= 24/3 = 8
15-8=7

The solution is 7!
401211
3 x 4= 12

36 - 12= 24
------------------
9 + 3= 12

24 divided by 12= 2

15 - 2= 7

Hope this helped!