91.
13 + 14 - 105 = -78
309?
78+78-:(85)/(78)+7,879=1405
78 + 89 + 167 + 897 + 78 = 1309
The LCM of 13 and 78 is 78.
55 + 82 + 92 + 78 + 100 + 96 + 78 = 581
6x+13 = 97-6 6x = 97-6-13 6x = 78 x = 13
78 + 78 = 156
the answer is 78. 6,12,18,24,30,36,42,48,54,60,66,72,78.
6 ____ 13 /78 78 ---- 0
6
13