Traditional Culture Encyclopedia - Travel guide - A math problem, solve it
A math problem, solve it
Suppose Xiao Ming’s departure day is number x
7x+1+2+3+4+5+6=84
7x+21=84
p>
7x=84-21
7x=63
x=9
Answer: Xiao Ming went out on the 9th.
Suppose Xiaowei’s return date is x, and the month is July (summer vacation is July or August, because August is a decimal, so July is chosen)
7x-1 -2-3-4-5-6+7=84
7x-14=84
7x=84+14
7x=98
x=14
Answer: Xiaowei returned on July 14th.
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