11a+2b+a+34b=12a+36b chia heets cho 12

maf 11a+2b chia heets cho 12 => a+34b chia heets cho 12

1 many 

2 illiterate

3 people

văn bản của bạn được viết bằng anh-anh nên mình sẽ viết cho bạn một văn bản bằng anh mỹ nhé:

Every country has many people who voluntarily take care of others. No matter who you are and how old you are, you do volunteer work. There are a lot of volunteer work such as visiting the elderly, sick, teaching poor children, however, have you ever thought about why people do volunteer work? It certainly has many reasons for it. In my opinion, there are five main reasons why people do volunteer work. The first reason, I think it is the humanity. People who feel lucky and have a good life, know how to share the feelings of the poor, the injured, the disabled ... etc. Therefore, they want to share with them their difficulties and sorrows, help them. can help them get through the troubles. They want to bring happiness to poor and disabled children as well as boys without fathers and mothers without mothers. They want to help these kids go to school and teach them what they usually learn from their parents. Besides, they take care of the elderly and the sick because they consider them as their relatives, hoping to help them overcome loneliness and sickness. They also want their kids to be human. They teach them to love and help others. Second, people do volunteer work because it's their hobby in their spare time, perhaps ”. Instead of listening to music or playing games… .. we to do volunteer work. It's really fun and we can help others, too. Some people have shared. Third, some people do it because it's their job. These people often work in volunteer organizations. They get paid for it. The fourth reason is that people not only want to help, but they also prace their ability in social activities, volunteering. They think that it can both help others and train themselves. They also find friends or people who them. In the end, people volunteer because they think that the happiest people in the world are the ones who help make others happy.

giúp mik với mn ơi

bạn ơi ! mik hỏi bn cái kết bài thôi mà sao bn viết dài thế ? với lại mình thấy nó hơi bị..........LẠC ĐỀ!!!!!!!!

• Tam Quốc diễn nghĩa - La Quán Trung.
• Tây du kí - Ngô Thừa Ân.
• Thủy hử - Thi Nại Am.
• Hồng lâu mộng - Tào Tuyết Cần.
• Tứ đại kỳ thư – Bốn tác phẩm văn học với bốn phong cách thể hiện riêng đã đem lại cho độc giả một cái nhìn tổng quát về xã hội Trung Quốc trải qua các biến cố lịch sử.

6=2.3

3 là ước nguyên tố khác 2 và 5

là 3,7,.............. nhìu lắm

Ghi thế này thì đề chỉ có \(3^{x+1}-3^x=18\)

\(\Rightarrow3^x\cdot3^1-3^x=18\)

\(3^x\cdot\left(3^1-1\right)=18\)

\(3^x\cdot2=18\)

\(3^x=9\)

\(x=2\)

Ta có: \(3^{x+1}-3^x=18\)

\(\Leftrightarrow3^x.3-3^x=18\)

\(\Leftrightarrow3^x\left(3-1\right)=18\)

\(\Leftrightarrow3^x.2=18\)

\(\Leftrightarrow3^x=9\)

\(\Rightarrow x=2\)

Vậy \(x=2.\)

\(2x=5y=10z\)

\(\Rightarrow\frac{2x}{10}=\frac{5y}{10}=\frac{10z}{10}\)

\(\Rightarrow\frac{x}{5}=\frac{y}{2}=\frac{z}{1}\)

áp dụng tính chất dãy tỉ số bằng nhau

\(\frac{x}{5}=\frac{y}{2}=\frac{z}{1}=\frac{x+y+z}{5+2+1}=\frac{16}{8}=2\)

\(\Rightarrow\hept{\begin{cases}\frac{x}{5}=2\Rightarrow x=10\\\frac{y}{2}=2\Rightarrow y=4\\\frac{z}{1}=2\Rightarrow z=2\end{cases}}\)