1. The book store is to the right of the phothocopy store.

=>The photocopy store ..is..to..the..left..of..the..book..store..

2.The museum is behinh the stadium.

=>The stadium..is..front..of..the..museum..

3.Hue's house is near a river.

=>Hue's house isn't..far..a..river..

4.I have a brother, Minh.

=>Minh..is..my..brother..

5.Our shool há a small yard.

There..is..a..small..yard..in..our..school..

1.Mrs.Lien is a doctor.

2.Her house have four rooms.

3.The yard is small.

4.The flowers are to the left of house.

5.There is a well behind her house.

\(43+\left(9-21\right)=317-\left(x+317\right)\)

\(43+9-21=317-x-317\)

\(31=317-317-x\)

\(31=0-x\)

\(\Rightarrow x+0=-31\)

\(x=\left(-31\right)-0\)

\(x=-31\)

(-x+31)-39=69+11

-x+31=69+11+39

-x+31=119

-x=119-31

-x=88

\(\Rightarrow\)x=-88

Gọi d là \(ƯC\left\{n-5;3n-14\right\}\) với \(d\ne0\)

\(\Rightarrow\left(n-5\right)-\left(3n-14\right)⋮d\)

\(\Rightarrow3\left(n-5\right)-\left(3n-14\right)⋮d\)

\(\Rightarrow\left(3n-15\right)-\left(3n-14\right)⋮d\)

\(\Rightarrow15-14⋮d\)

\(\Rightarrow1⋮d\)

\(\RightarrowƯ\left(d\right)\in\left\{1;-1\right\}\)

Vì Ư(d)\(\in\)\(\left\{1;-1\right\}\) nên \(\RightarrowƯ\left(n-5;3n-14\right)\in\left\{1;-1\right\}\)

\(\RightarrowƯ\left(\dfrac{n-5}{3n-14}\right)\in\left\{1;-1\right\}\)

Vì ước của phân số \(\dfrac{n-5}{3n-14}\) là 1 hoặc -1 nên phân số \(\dfrac{n-5}{3n-14}\) là phân số tối giản.

Mong đc chị châm chước!^-^

Trong các nguyên tắc bầu cử, không có nguyên tắc nào sau đây

A. Phổ thông

B. Bình đằng

C. Gián tiếp

D. Bỏ phiếu kín