If 5 + 6 = 35; 4 + 5 = 24; 3 + 4 = 15; 8 + 11 = 96 Then 7 + 8 = ?

Question

If

5 - 3 = 13
8 - 1 = 68
6 - 3 = 24
9 - 5 = 35

Then

7 - 1 = ??

Answer 1

63

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5 + 6 = 35 ====== 5*7=35
4 + 5 = 24 ====== 4*6= 24
3 + 4 = 15 ====== 3*5= 15
8 + 11 = 96 ====== 8*12= 96
7 + 8 = ? ====== 7*9= 63