\(\frac{7}{5}-\frac{a}{4}=\frac{13}{20}\)
\(\frac{a}{4}=\frac{7}{5}-\frac{13}{20}\)
\(\frac{a}{4}=\frac{28}{20}-\frac{13}{20}\)
\(\frac{a}{4}=\frac{15}{20}\)
\(\frac{a}{4}=\frac{3}{4}\)
=> a = 3
\(\frac{7}{5}-\frac{a}{4}=\frac{13}{20}\)
\(\frac{a}{4}=\frac{7}{5}-\frac{13}{20}\)
\(\frac{a}{4}=\frac{75}{100}\)
Rút gọn \(\frac{75}{100}=\frac{3}{4}\Rightarrow\)\(\frac{a}{4}\)= \(\frac{3}{4}\)
Vì 3 = 3 Suy ra a = 3
7/5-a/4=13/20
a/4=7/5-13/20
a/4=75/100
75/100=3/4
3/4=a/4
Suy ra:a=3
\(\frac{7}{5}-\frac{a}{4}=\frac{13}{20}\)
\(\frac{a}{4}=\frac{7}{5}-\frac{13}{20}\)
\(\frac{a}{4}=\frac{28}{20}-\frac{13}{20}\)
\(\frac{a}{4}=\frac{15}{20}\)
\(\frac{3}{4}=\frac{15}{20}\)
a = 3
Vậy a = 3
7/5-a/4=13/20
a/4=7/5-13/20
a/4=75/100
75/100=3/4
3/4=a/4
Suy ra:a=3
Hok tốt !
