Traditional Culture Encyclopedia - Travel guide - During the summer vacation, Xiao Zhang's family experienced life in go on road trip and planned to drive the same distance every day. If the car travels more than planned every day 1.
During the summer vacation, Xiao Zhang's family experienced life in go on road trip and planned to drive the same distance every day. If the car travels more than planned every day 1.
Solution: suppose that the original planned daily mileage of this car is X kilometers, according to the meaning of the question:
Column inequality system
This line should be self-evident, right? 8(x+ 19)>2200
The same driving distance refers to the 8-day driving distance: 8(x+ 19) takes more than 9 days, so the 9-day driving distance is less than 8(x+ 19).
9(x- 12)& lt； 8(x+ 19)
Solution: 256
A: .......
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