I bought three composition books and four fairy tales books for a total of 32 yuan. I also bought two composition books and two fairy tales books for a total of 18 yuan

I bought three composition books and four fairy tales books for a total of 32 yuan. I also bought two composition books and two fairy tales books for a total of 18 yuan

Composition book X Yuan, fairy tale book y yuan
3x+4y=32
2x+2y=18
x=4
y= 5
Composition book 4 yuan, fairy tale book 5 yuan

A fairy tale topic! (100 points)
In the composition to bring in: examination room, rabbit, hillside, compass, fox
Just think of a topic. If you can, help me to write out the outline!

It's a cruel story
Examination game: Fox to graduate, must kill a rabbit in the specified time. And participate in the examination of the rabbit will get a compass, as long as in a certain period of time to avoid the fox's pursuit on the line. Examination location in the hillside
You can set up all kinds of traps, two wits and two braves. The final outcome depends on your mood. But I think it's better for rabbit to win, or two people in danger, and then work together to tide over the difficulties. It's just like a fairy tale

A commodity used to cost 6800 yuan per piece. After 20% price increase, it was reduced by 20%. How much is it now

Determinant
6800*(1+20%）（1-20%）
=6800*1.2*0.8
=6528
A: now it's 6528 yuan

What's the ratio between the current price and the original price of a kind of exercise book?

The current price is:
（1+10%）（1-10%）
=1.1×0.9
=0.99
Current price: original price = 0.99:1 = 99:100
If you don't understand, please ask

The original price of a laptop was 4000 yuan. It was first increased by 20% and then decreased by 12.5%. What's the price now
The original price of a laptop was 4000 yuan. It was first increased by 20% and then decreased by 12.5%
How much is the current price

The original price of a laptop is 16000 yuan. Now the price of this laptop is reduced by X%, so the price after the reduction is________

That's 16000 * (1-x%)

The original price of a laptop is a yuan, and the price after 10% reduction is?

The selling price is 90% a yuan

The original price of a certain brand of notebook computer is 5000 yuan, but now the price is reduced by 1 / 5. How much is the current price?

5000X80%=4000
Cut the price by one fifth, that's 20% off
So the price is 4000 yuan
Welcome to ask, thank you for your adoption

The original price of a laptop was 5000 yuan, which was reduced by 10% first and then 10%. Now the price is () yuan, and the oil yield of rapeseed is
The original price of a laptop is 5000 yuan, which is reduced by 10% first and then 10%. Now the price is () yuan,
The oil yield of rapeseed is 40%. 200 kg rapeseed can extract () kg oil, and 50 kg rapeseed needs () kg oil
60% of the number a is equal to 75% of the number B. It is known that the number B is 80 and the number a is ()

1. 4050 yuan
2. 80kg 125kg
3、100

The price of a computer has been increased by 20% and then decreased by 20%. Has the price of a computer increased or decreased compared with the original price? What percentage has it increased (or decreased)?

First it went up by 20%, then it went down by 20%