Solving equations and practical problems The distance between the two places is 42 kilometers. Xiaoming starts from place a to place B by bike at a speed of 20 kilometers. 0.4 hours later, Xiaogang starts from place B by motorcycle. 0.5 hours later, they meet on the way,

Solving equations and practical problems The distance between the two places is 42 kilometers. Xiaoming starts from place a to place B by bike at a speed of 20 kilometers. 0.4 hours later, Xiaogang starts from place B by motorcycle. 0.5 hours later, they meet on the way,

After 0.4 hours, Xiao Ming walked 20 * 0.4 = 8 km by bike
So the remaining distance is 42-8 = 34 km
Assuming that the small rigid velocity is x, we can get (x + 20) * 0.5 = 34
The solution is x = 48
That is, the small rigid speed is 48

Do you have 10 practical problems for solving equations
It's better to be shorter

It takes 4 days for Party A and 6 days for Party B to process a batch of machine parts. Now Party B will do it for one day, and then they will cooperate to complete it. The total reward is 600 yuan. If the reward is paid according to the individual workload, how much will Party A and Party B get respectively

How to use addition, subtraction, multiplication and division to make four four equal to eight

There are many answers to this question, not the only one
① 4×4－（4＋4）
② 4×4－4－4
③ 4＋4－4＋4
④ 4＋4－（4－4）
⑤ （4＋4）÷（4÷4）
⑥ 4＋4×4÷4
……

The four numbers are calculated by adding, subtracting, multiplying and dividing to get 24
I remember someone worked it out before, but now I forget it~

5*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/5))*5=245*(5-1/5)=245*(5-(1/5))=245*(5-1/5)=245*(5-(1/5))=24(5-1/5)*5=24(5-(1/5))*5=24(5-1/5)*5=24(5-(1/...