Question

Help please I really need help please

Answer 1

a=23,b=7,c=15,d=9

Explanation:

look at the top left - bottom right diagonal, the sum:

8+16+24 = 48

a=48-8-17 = 23

b=48-25-16 = 7

c=48-8-25 = 15

d=48-16-a=48-16-23=9