\(\frac{x}{2}=\frac{2}{3}+\frac{-1}{5}\)
\(\Rightarrow\frac{x}{2}=\frac{2}{3}-\frac{1}{5}\)(quy tắc chuyển vế đổi dấu)
\(\Rightarrow\frac{x}{2}=\frac{7}{15}\)
\(\Rightarrow x:2=\frac{7}{15}\)
\(\Rightarrow x=\frac{7}{15}.2=\frac{14}{15}\)
Nếu bạn không chắc kết quả này là đúng thì thử lại đi
\(\frac{x}{2}=\frac{2}{3}+\frac{-1}{5}\)
=>\(\frac{x}{2}=\frac{13}{15}\)
=>\(\frac{x.15}{30}=\frac{26}{30}\)
=>x.15=26=\(\frac{26}{15}\)
=>x=26:15=
Theo bài ra ta có:
\(\frac{x}{2}=\frac{2}{3}+\frac{-1}{5}\Rightarrow\frac{x}{2}=\frac{10}{15}+\frac{-2}{15}=\frac{8}{15}\)
\(\Rightarrow\frac{x}{2}=\frac{8}{15}\Rightarrow15x=16\Rightarrow x=16:15=\frac{16}{15}\)
\(\frac{x}{2}\)\(=\)\(\frac{2}{3}\)\(+\)\(\frac{-1}{5}\)
\(\frac{x}{2}\)\(=\)\(\frac{7}{15}\)
\(x\)\(=\)\(\frac{14}{15}\)
Vậy\(x\)= \(\frac{14}{15}\)
mình nhầm :^-^
\(\frac{x}{2}=\frac{2}{3}+\frac{-1}{5}=\frac{10}{15}+\frac{-3}{15}=\frac{7}{15}\)
\(\frac{\Rightarrow x}{2}=\frac{7}{15}\Rightarrow15x=14\Rightarrow x=\frac{14}{15}\)
