Hurry! Ten minutes to! Primary school mathematics sixth grade score reduction method to solve application problems! The main road team built a road. On the first day, it built 1 / 5 and 100 meters of the total length. On the second day, it built the remaining 2 / 7 and 500 meters. How many meters is the total length of the road? (use equation solution) Write down the process again, please!

Let this road be x meters in length
X-(X*1/5+100)-(X-(X*1/5+100))*2/7=500
The solution is x = 1000
The road is 1000 meters long

Li Gang and Zhang Qi jump rope together. Li Gang jumps for 3 minutes first, and then they jump for 2 minutes. A total of 610 jumps have been made. It is known that Li Gang jumps 10 more than Zhang Qi every minute. How many more jumps can Li Gang jump than Zhang Qi?

Zhang Qi jumps [610-10 * (3 + 2)] / (3 + 2 + 2) = 80 per minute
Li Gang jumps every 10 + 90 minutes
Li Gang jumps 90 * (3 + 2) - 80 * 2 = 290 more than Zhang Qi

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