Question 3: Detail Thank you, Question 3: Question 3: Question 1 Detail process Thank you

1、g=4*1000 / 6x

2000/3x

h=3*1000/(216-x)

3000/(216-x)

2. Let g=h, and get the equation: 2000 3x =3000 (216-x) to get x

When x 39, g

When x 39, g

3. When g=h, it takes the least time. That is, 39 people are arranged to produce G device, and 216-39 = 177 people are arranged to produce H device.

Solution: It is necessary to produce g 4000 pcsh = 3000 (pcs) g (x) = 4000 6x

h(x)=3000/3(216-x)2. g(x)-h(x)=4000/6x-3000/3(216-x) =(4000(216-x)-6000*6x)/6x(216-x)=(864000-40000x)/6x(216-x)

864000-40000x>>0 ,x<<22 when x is less than 22 people, g(x)-h(x)>0,3To minimize time, g(x)-h(x)=0 x=22 is required.

3 hours to walk 834km, that is, 1 hour to walk 834 3 = 278km, and then 1 hour to walk the acres to infiltrate the acres of the bush to arrive, so a total of 4 hours to go hungry, that is, 4x278 = 1112km

First, find the speed zone blindness = 834 3 = 278 km/h.

Then find out the distance of another 1 hour: Calling the Spike.

278 1 = 278 km, and then put the distance traveled in 3 hours + the distance traveled in another 1 hour = the total distance from Wuhan to Kongzhou in the Guangyu chain.

1112 (km).

65 * 3-15 = 180 tons in the afternoon, 180-65 = 115 tons more in the afternoon than in the morning.

Than the morning, then the morning is the unit one, so it is easier to do, just according to the title on the line, in the afternoon is 65 3-15 = 180, and then use 180-65 = 105.

Wow. Question 1 4 52 = 1 13

Question 2 52*1 13=4 kg.

Question 3 4 (1 13) = 52 kg.

Question 4 54 (9 10) * (5 6) = 50 Question 5 72 9 * (9 + 5) = 112 Question 6 120 * (1 4) (3 4) = 40 Question 7 Quarrel 150 (5 6) (2 3) = 270

5 (100+80)=900 (meters).

900 (100-80) = 45 (minutes).

45+5) 100=5000 (meters).

A: My sister walked a total of 5,000 meters.

Set 5 minutes later, my sister walked x minutes to catch up with my sister.

100*5+80*5+80x=100x

x=45 walked for a total of 45+5=100 minutes.

100*100=10000 meters.

The older sister walks 2*100*5=1000 (meters) more than the younger sister

Total travel time = 1000 (100-80) = 50 (minutes).

The distance my sister walked was 100*50=5000 (meters).

Yuanzhong has already counted the 2 yuan stolen by the waiter, why add it again to 29 yuan to confuse others?!

2. Just list a system of binary equations, let the chicken x rabbit y, x+y=35, 2x+4y=94 solve x=23, y=12, so chicken 23 rabbit 12

3. I can't think of it for the time being, and I may have to discuss it by category.

4. The result of Xiao Ming and Xiao Hua exchanging candies is the same as the result of Xiao Hua giving Xiao Ming 6 candies, so Xiao Hua has more sugar, 6 more.

*9+2 is meaningless, 2 is part of 3*9;

In fact, each person spends 9 yuan, a total of 27 yuan = 25 yuan for the hotel + 2 yuan for the waiter;

The head is a total of 35 chickens and rabbits, if all 35 are rabbits, the legs (feet) should be 35 * 4 = 140, the actual 94, the difference is 46, the rabbit has two more legs than the chicken, so the actual number of chickens = 46 2 = 23, rabbit = 35-23 = 12;

3. It needs to be considered in combination with the total number of rooms.

4. After Xiao Ming gave Xiao Hua 8 pieces, Xiao Hua gave Xiao Ming another 14 pieces, which is equivalent to Xiao Hua giving Xiao Ming 6 pieces, and the number of sugar cubes in the bag of the two people is equal, so it turns out that Xiao Hua has more sugar, 6 * 2 = 12 pieces.