Question

Tìm x thuộc số nguyên: \(\frac{x}{3}=\frac{2}{5}+-\frac{1}{7}\)

Answer 1

\(\frac{x}{3}=\frac{2}{5}+\left(-\frac{1}{7}\right)=\frac{2}{5}-\frac{1}{7}=\frac{9}{35}\)

\(\Rightarrow x=\frac{9}{35}.3=\frac{27}{35}\)

Answer 2

\(\frac{x}{3}=\frac{2}{5}+\left(-\frac{1}{7}\right)\)

→ \(\frac{x}{3}=\frac{2}{5}-\frac{1}{7}\)

→ \(\frac{x}{3}=\frac{9}{35}\)

→ \(\frac{x}{1}=\frac{3}{35}\)

→ \(\frac{x}{35}=\frac{3}{35}\)

→ x = 3

 

 

Answer 3

Đây là toán thì phải

Answer 4

\(\frac{x}{3}=\frac{2}{5}+-\frac{1}{7}\)

\(\frac{x}{3}=\frac{2}{5}-\frac{1}{7}\)

\(\frac{x}{3}=\frac{9}{35}\)

\(\Rightarrow x=\frac{9}{35}.3\)

\(=\frac{27}{35}\)

\(\Rightarrow x=27\)

 

Answer 5

TOAN A

 

Answer 6

bạn vào toán mà nói 

 x=27