Question

[Gia Bảo Trần]

Bài 2:  Tìm y, biết :

a) y + 3/8  x  4/9 = 11/12          b) 5/7 + y/35 = 4/5

Answer 1

[Nguyễn Đăng Nhân]

a) \(y+\frac{3}{8}\text{x}\frac{4}{9}=\frac{11}{12}\)

\(y+\frac{3\text{x}4}{2\text{x}4\text{x}3\text{x}3}=\frac{11}{12}\)

\(y+\frac{1}{6}=\frac{11}{12}\)

\(y=\frac{11}{12}-\frac{1}{6}\)

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

Answer 2

[Nguyễn Đăng Nhân]

b) \(\frac{5}{7}+\frac{y}{35}=\frac{4}{5}\)

\(\frac{y}{35}=\frac{4}{5}-\frac{5}{7}\)

\(\frac{y}{35}=\frac{3}{35}\)

\(\Rightarrow y=3\)