Kindergarten teachers give each child 5 biscuits, 22 more biscuits; each child 7 biscuits, 18 less biscuits How many children and how many biscuits are there?

Let x children, y biscuit
5X+22=y
7x-18=y
x=20
y=122

The price of two packs of biscuits and three bags of fructose is 18.9 yuan, and that of three packs of biscuits and two bags of fructose is 15.6 yuan?
To process analysis. Thank you. Primary school mathematics

Two bags of biscuits three bags of sugar than three bags of biscuits two bags of sugar expensive 18.9-15.6 = 3.3 yuan, then in 18.9 yuan, there are three bags of sugar, three bags of sugar than two bags of biscuits expensive 3.3 + 3.3 + 3.3 = 9.9 yuan, so, in this 18.9 yuan, there are 9.9 yuan is the price of sugar expensive, the remaining 18.9-9.9 = 9 yuan, this is if you change three bags of sugar into three generation biscuits

If the children in the middle class of the kindergarten are divided into 5 biscuits, there are 22 biscuits left; if they are divided into 7 biscuits, there are 18 biscuits left People, biscuits Block

① (18 + 22) △ 7-5, = 40 △ 2, = 20 (people); ② 20 × 5 + 22, = 100 + 22, = 122 (pieces); answer: there are 20 students, 122 biscuits. So the answer is: 20122

1. The ratio of boys to girls in Guangming primary school is 7; 8, so boys are less than girls. 2. A number is divided by 6, 15 and 21, and there is 3. What's the number? 3
To find the average of several numbers is equivalent to dividing the sum of these data into several parts, right or wrong
Is there anyone to answer me? If you are the first to answer me, choose him as the best answer

The first question is too little data
Answer 213
Yes

Kindergarten teachers give each child 5 biscuits, 22 more biscuits; each child 7 biscuits, 18 less biscuits How many children and how many biscuits are there?