Answer:
a=23
b=7
c=15
d=9
Step-by-step explanation:
first, we can see that the sum of a row, column, or diagonal is 48, because we can add the diagonal consisting of numbers 8, 16, and 24.
Next, we can find a:
8+17+a=48
a= 23
Then find b:
17+b+24=48
b=7
now find the middle column:
23+16+d=48, remember that a is 23
d=9
finally, we can find c:
8+25+c=48
or
9+24+c=48
both give c=15 as the answer
