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There are 240 workers in a factory, 58 of them are women workers. Later, several women workers are transferred in. At this time, women workers account for 2029 of the total number. How many women workers are transferred in?
240 × (1-58) / (1-2029) - 240, = 240 × 38 × 299-240, = 290-240, = 50 (people); answer: transfer 50 female workers
The number of male workers in a workshop is five less than eight fifths of the total number, while the number of female workers is 38 more than two ninths of the total number. How many workers are there in this workshop?
There are x workers in this workshop?
（5x／8－5）＋（2x／9＋38）＝x
x－5x／8－2x／9＝33
72x－45x－16x＝33×72
11x＝33×72
x＝216
The sum of a and B is 162.8. If the decimal point of B moves one place to the right, it is equal to A. how many are a and B?
Let B be x, a be 10x, 10x + x = 162.8, & nbsp; 11x = 162.8, & nbsp; & nbsp; & nbsp; X = 14.8, a be 10x = 10 × 14.8 = 148
The distance between a and B is 2800 meters. Five minutes after a starts from village a, Xiaojun B starts from village B, and 10 minutes later they meet. B runs 130 meters more than a, and a runs several meters more than a
Distance = time * speed meet problem formula is meet distance = distance a walk + distance b walk more detailed? 2800 = speed of a * (10 + 5) + speed of B * 10 speed of a = (2800 - speed of B * 10) / (10 + 5) to solve this step, you will draw inferences from one instance to calculate the answer, right
A total of 11.5 tons of goods are transported by the two vehicles. The goods transported by a vehicle are two times less than those transported by B vehicle. How many tons of goods are transported by the two vehicles
If vehicle B transports x tons, vehicle a transports 2x-1 / 2 tons
X+2X-1/2 =11.5
3X=11.5+0.5
3X=12
X=4
That is to say, 4 tons will be transported by vehicle B and 7.5 tons will be transported by vehicle a
Set B car to transport x tons
x+2x-1/2=11.5
The solution is x = 4, so 2x-1 / 2 = 7.5
So car a transported 7.5 tons, car B transported 4 tons
Solution: let car B transport x T, then car a transport (2x-0.5) t
X + （2X-0.5）= 11.5
It is concluded that t = 4
So (2x-0.5) = 7.5 t
A: car a transported 7.5 tons and car B transported 4 tons.
After 4 hours of driving from ab 20% at the same time, car a runs 80 / 100 of the whole journey, while car B exceeds the midpoint by 13km. Car a runs 3km more than car B every hour
If car a travels 3km more per hour than car B, then car a travels 3 × 4 = 12 (km) more per hour than car B
Car B exceeds the midpoint by 13km, and car a exceeds the midpoint by 13 + 12 = 25 (km), equivalent to 80% of the whole journey,
Distance 25 (80% - 50%) = 250 / 3 (km)
The sum of a and B is 162. If the decimal point of a moves one place to the left, it is equal to 8 / 10 of B. what is the number of a?
Let a be x and B be y, then x + y = 162, X / 10 = 8y / 10,
X=144
Let a number x, B number 162-x
0.1x=（162-x）×8/10
The solution is x = 144
One hundred and forty-four
A and B two people from a and B two places at the same time to each other. It is known that a's speed is faster than B's. 8 hours later, a and B meet at C point, if a
Add 2 km each, then the encounter will be shortened by 2 hours. The distance between point C and point D is 3 km. What's the original speed of a?
Set a speed X
A's journey: (x + 2) * 6 + 3 = 8 * x
So x = 7.5
The speed of a is 7.5 km / s
You can also find the total distance
B speed y total distance is 8 (x + y)
Speed up the total distance = 6 (x + 2 + y + 2) = 6 (x + y) + 24 = 8 (x + y)
The total distance is 96 km with x + y = 12
A total of 10 tons of goods have been transported by the two vehicles. The goods transported by the two vehicles are two times less than the goods transported by the two vehicles. How many tons of goods have been transported by the two vehicles? (solved by equation)
If x tons and Y tons are transported by two trucks, then
x+y=10,
x=2y-1/2,
The solution is x = 13 / 2, y = 7 / 2,
A: Party A and Party B have transported 6.5 tons and 3.5 tons respectively
Set X tons for vehicle B and 2x-1 / 2 tons for vehicle a
X+2X-1/2=10
3X=10.5
X=3.5
2*3.5-0.2=6.5
Party a transported 6.5 tons and Party B 3.5 tons
If the goods transported by car a are x, the goods transported by car B are y
X + y = 10 tons
X = 2y-1 / 2T
2Y-1/2+Y=10
3Y=10.5
Y = 3.5 tons
X = 2 * 3.5-1 / 2 = 7-0.5 = 6.5 tons
Party A transports 6.5 tons of goods and Party B transports 3.5 tons of goods.
A total of 10 tons were transported
Set X tons for vehicle B and 2x-1 / 2 tons for vehicle a
X+2X-1/2=10
3X=10.5
X=3.5
2*3.5-0.2=6.5
Party a transported 6.5 tons and Party B 3.5 tons
A and B two cars respectively from AB two cities at the same time, after 4 hours, a car line 80% of the whole, B car more than in
12 kilometers. It is known that car a is 3 kilometers more than car B per hour. How many kilometers is the distance between AB and ab? (fast!)
The distance between AB and ab is x km
80%x÷4-（x÷2+12）÷4=3
0.8x-0.5x-12=12
0.3x=24
x=80
A: the distance between AB and ab is 80 km
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