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A fraction is multiplied by 23 and 47 respectively. The sum of the two products is 1314. The fraction is______ ．
Let this number be X. from the meaning of the question, we can get: 23x + 47x = 1314, & nbsp; & nbsp; 2621x = 1314, & nbsp; & nbsp; & nbsp; & nbsp; X = 34. A: the score is 34. So the answer is: 34
Does Lele take some money to buy laptops? Is the unit price inversely proportional to the number of laptops purchased?
Don't worry, let's take our time
Lele takes a certain amount of money, but the more expensive the unit price is, the smaller the number of copies it will buy;
The cheaper the unit price, the more books you buy
One of the characteristics of inverse proportion is that when a number becomes larger, a number becomes smaller
When the unit price * the number of books bought = the total amount of money
So, his second condition: their product must be
In the end, it can be proved that it is in inverse proportion
Xiaoming can buy four bottles of drinks for 2 yuan, and three empty bottles can be exchanged for one. How many bottles can Xiaoming drink at most
Six bottles
Star juice store a kind of juice is 1 yuan more expensive than B kind of juice. It's 16 yuan to buy 3 cups of B kind and 2 cups of a kind of juice. How much are a and B kinds of juice? It's one yuan per square,
Let B be x yuan per cup, then a be (x + 1) yuan per cup
3X+2（X+1）=16
X=2.8
A is 3.8 yuan per cup, B is 2.8 yuan per cup··
In Xingxing fruit juice store, a kind of fruit juice is 1 yuan more expensive than B kind of fruit juice. Xiaobin and his classmates asked for 3 cups of B kind of fruit juice and 2 cups of a kind of fruit juice, which cost 16 yuan in total. What are the unit prices of a kind of fruit juice and B kind of fruit juice?
Suppose B juice is x yuan, then a juice is (x + 1) yuan. From the meaning of the question, 3x + 2 (x + 1) = 16, the solution is: x = 145, then a juice is 145 + 1 = 195 yuan. Answer: the unit price of a juice and B juice is 145 yuan and 195 yuan respectively
A kind of fruit juice in a fruit juice shop is one yuan more expensive than B kind of fruit juice. Xiaobin and his classmates asked for three glasses of B kind of fruit juice and two glasses of a kind of fruit juice, a total of 17 yuan. What's their unit price?
A series of equations
Louzhu primary school or junior high school
Let B juice X Yuan, then a juice x + 1 yuan
3x+2(x+1)=17
3x+2x=17-2*1
5x=15
x=3
3 + 1 = 4 (yuan)
It can also be used as a system of linear equations of two variables
I will not give a detailed answer here
It's 26 yuan for two cups of juice, three drinks, 28 yuan for one cup of juice and four drinks. How much for one cup of juice and one drink?
Hello
Two glasses of juice and eight drinks are 28 * 2 = 56 yuan
So 8-3 = 5 drinks is 56-26 = 30 yuan, a cup of 30 / 5 = 6 yuan
So a cup of juice is 28-4 * 6 = 4 yuan
Or, juice x yuan / cup, drink y yuan / cup
Then 2x + 3Y = 26
x+4y=28
The solution is x = 4, y = 6
1、 In Xingxing fruit juice store, a kind of fruit juice is 1 yuan more expensive than B kind of fruit juice. Xiaobin and his classmates asked for 3 cups of B kind of fruit juice and 2 cups of fruit juice. It cost 16 yuan in total. What are the unit prices of a kind of fruit juice and B kind of fruit juice?
2、 A bookshelf is 88cm wide. A certain layer is full of the first volume of mathematics books and Chinese books, a total of 90. Xiaoming measured that a mathematics book is 0.8cm thick and a Chinese book is 1.2cm thick. Do you know how many mathematics books and Chinese books are on this shelf?
write on paper.
1、 Let B juice have X elements and the equation 3x + 2 × (x + 1) = 16
In Xingxing juice store, a kind of juice is 1 yuan more expensive than B kind of juice. Xiaobin and his classmates bought 3 cups of B kind of juice and 2 cups of a kind of juice
It's a one-dimensional equation, a little more detailed
A-B = 1 3B + 2A = 16
A = B + 1 is deduced from A-B = 1, and 3b + 2A = 16 is brought in, that is 3B + 2 (B + 1) = 16 to solve the equation: 3B + 2B + 2 = 16
5B + 2 = 16 b = 2.8 A = 3.8 validation: 3.8 * 2 + 2.8 * 3 = 7.6 + 8.4 = 16
There are three teachers leading 72 students to spring outing. They want to bring a bottle of drink to each student. How can they buy a good deal?
Wholesale, of course!
RELATED INFORMATIONS
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