How many stamps are there in total and what is the face value? Come on, a master. 5

On June 25, 2012, China Post will issue a set of 1 set of stamps for personalized service of "Aerospace". Details are as follows:

Title Face value.

Aerospace Yuan.

Stamp size: 30-30 mm.

Included ticket size: 30-30 mm.

Perforation degree: 12 degrees.

Version: Offset printing.

Anti-counterfeiting method: anti-counterfeiting paper.

Security inks. Designer: Hu Zhenyuan, Li Qun, Ma Lihang.

Information provided by: China Manned Space Engineering Office, Beijing Panoramic Vision Network Technology Co., Ltd.

Responsibility: Liu Yuxiao.

Printing plant: Beijing Stamp Factory.

The above is the issuance information, aerospace is a personalized stamp, a full set, face value yuan, large edition of 15 pieces per edition, the market price of the set of about 4 yuan, the current market price of about 80 yuan.

Note: The large version looks like 30 tickets, but in fact, 15 of them are secondary tickets.

In order to commemorate the manned rendezvous and docking mission of Tiangong-1 and Shenzhou-9, China Philatelic Corporation issued a commemorative stamp pack of "Hymn to Tiangong" on June 17 with the authorization of the China Astronaut Research and Training Center.

The "Shen Jiu" stamp pack contains 3 astronaut editions, a special layout personalized stamp, a commemorative cover for the collection of 3 astronauts, and a commemorative sheet. The main picture of the 3 special layout personalized stamps adopts the national flag pattern, and the attached picture is the portrait of the three astronauts who carried out the Shenjiu mission, and matches the signatures of the corresponding astronauts.

Xiaohua bought a total of 17 stamps with a face value of 2 jiao and 1 yuan for 2 yuan and 5 dimes, and asked if the two stamps were bought less than how to do it, no.

25 (1+2)=8 remainder 1

The above formula explains: 2 corners can buy 8 sheets, 1 corner can buy 8 pieces and one more, that is, 9 pieces.

There are 42 stamps in two corners and 36 stamps in five corners.

This is really simple, the bounty is too low, I don't want to write, list binary equations.

Cruz admission without a figure I went in the afternoon. Rabbit no picture.

3 All of them originally had a total of 10 stamps.

Me: 9 pieces; You: 1 piece.

9-4*2=1 piece.

9 + 1 = 10 pieces.

We have a total of 10 stamps.

9+5 14 (pcs).

A: They originally had a total of 14 stamps.

I have a 100 stamp, which is a commemorative stamp and is inlaid with pure gold leaf, so it is so expensive, it is the most expensive I have ever seen.

According to the title, there are a total of 32 stamps with pentagonal and octagonal denominations. And the total value is the meta. So let's assume that these 32 stamps are all octagonal.

So there are 14 stamps for the octagonal and 18 stamps for the pentagonal.

There are x stamps with five corners, and y stamps with eight angles, which can be listed as follows:

x+y=32

5x+8y=202

It can be obtained after substitution.

x=32-y

Solution: There are x pentagonal stamps and y octagonal stamps. According to the question of the equation x+y=32

0. 5x+

The solution is x=18

y=14, there are 18 pentagonal stamps and 14 octagonal stamps.

High school physics teacher wishes you progress in your studies!

Set: pentagonal x, octagonal y, equation solution.

x y 32 sheets

Yuan 10: 5x 8y 202

Formula 5: 5x 5y 160

①：3y＝42

y＝14x＝32－14＝18

18 pentagonal and 14 octagonal.

There are 50 stamps of each of the two stamps.

According to the title, the number of stamps of two denominations is equal, so there are two kinds of stamps each have x, 60 points = yuan, 80 points = yuan, according to the title, the equation can be listed as:

Solve this equation to give x=50

So there are 50 stamps for each of the two stamps.

Sixty x pieces, 80 x pieces.

60x＋80x＝7

140x=7

x=140÷7

x = 7080 points: 140 70 = 70 pieces.

ps.Probably wrong, I'm not very good at math. ）