Answers

2016-07-31T19:14:21+08:00
70/18 = 70 - 16 all over x
70/18 = 54/x
Simplify 70/18 = 35/9
35/9 = 54/x
Cross multiply 
35x = (54)(9)
35x = 486
x = 486/35
x = 13 31/35 days or approximately 13.89 days
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