\(\frac{x+22}{11}+\frac{x+23}{12}=\frac{x+24}{13}+\frac{x+25}{14}\)

\(\Leftrightarrow\left(\frac{x+22}{11}+1\right)+\left(\frac{x+23}{12}+1\right)=\left(\frac{x+24}{13}+1\right)+\left(\frac{x+25}{14}+1\right)\)

\(\Leftrightarrow\frac{x+33}{11}+\frac{x+35}{12}=\frac{x+37}{13}+\frac{x+39}{14}\)

\(\Leftrightarrow\frac{x+33}{11}+\frac{x+35}{12}-\frac{x+37}{13}-\frac{x+39}{14}=0\)

\(\Leftrightarrow\frac{2184\cdot\left(x+33\right)+2002\cdot\left(x+35\right)-1848\cdot\left(x+37\right)-1716\cdot\left(x+39\right)}{24024}=0\)

\(\Leftrightarrow2184x+72072+2002x+70070-1848x-68376-1716x-66924=0\)

\(\Leftrightarrow622x+6842=0\)

\(\Leftrightarrow x=-11\)

a) 9/22 x 33/18 =3/4

b) 12/35 : 36/25 = 5/21

c) 19/17 : 76/51 =3/4

a) \(\frac{9}{22}\times\frac{33}{18}\)

\(=\frac{9}{22}\times\frac{11}{6}\)

\(=\frac{9\times11}{22\times6}=\frac{3}{4}\)

b) \(\frac{12}{35}:\frac{36}{25}=\frac{12}{35}\times\frac{25}{36}\)

                     \(=\frac{5}{21}\)

c) \(\frac{19}{17}:\frac{76}{51}=\frac{19}{17}\times\frac{51}{76}\)

                      \(=\frac{3}{4}\)

\(a,\frac{9}{22}x\frac{33}{18}\)

\(=\frac{3.3.11.3}{11.2.3.3.2}\)

\(=\frac{3}{2.2}\)

\(=\frac{3}{4}\)

\(b,\frac{12}{35}:\frac{36}{25}\)

\(=\frac{12}{35}.\frac{25}{36}\)

\(=\frac{12.25}{35.36}\)

\(=\frac{12.5.5}{5.7.12.3}\)

\(=\frac{5}{7.3}\)

\(=\frac{5}{21}\)

\(c,\frac{19}{17}:\frac{76}{51}\)

\(=\frac{19}{17}.\frac{51}{76}\)

\(=\frac{19.51}{17.76}\)

\(=\frac{19.17.3}{17.19.4}\)

\(=\frac{3}{4}\)

Đáp án A

Đáp án A

8/25y + 25% - 17% x Y= 22

8/25 x Y +4/50 x Y =22

2/5 x Y=22

Y=108/5 

MÌNH CÓ BỎ MỘT SỐ BƯỚC, BẠN THÔNG CẢM

8/25y + 25% - 17% x Y= 22

8/25 x Y +4/50 x Y =22

2/5 x Y=22

Y=108/5 

MÌNH CÓ BỎ MỘT SỐ BƯỚC, BẠN THÔNG CẢM

8/25y + 25% - 17% x Y= 22

8/25 x Y +4/50 x Y =22

2/5 x Y=22

Y=108/5 

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