Cheko and Keddy had the same amount of money initially. After Cheko donated $234 and Keddy donated $156 to charity, Keddy had 3 times as much as Cheko. How much had Keddy in the end?
At the start: k + 156 = c + 234 (1)
At the end k = 3c (2)
Put (2) into (1): 3c + 156 = c + 234
2c = 78
c = 39
so, from (3) k = 3*39 = 117
Keddy had $117 in the end.
