\(\frac{32}{23}=\frac{896}{a}\Leftrightarrow32.a=23.896\Rightarrow a=\frac{23.896}{32}=\frac{20608}{32}=664\)

Vậy a = 664

\(\frac{32}{23}\) =\(\frac{896}{a}\)

rút gọn \(\frac{384}{208}\) = \(\frac{384\div16}{208\div16}\) = \(\frac{24}{13}\)

vậy a = 24

\(\frac{384}{208}=\frac{a}{13}\Leftrightarrow384.13=208.a\Rightarrow a=\frac{384.13}{208}=\frac{4992}{208}=24\)

Vậy a = 24

Quy đồng xong ta sẽ có hai phân số như sau: 6/8 và 5/8

a)5/4 b)5/4 vậy  ( 9/2-5/2)-3/4=9/2-(5/2+3/4)

a) \(\frac{1}{2}=\frac{2}{4}=\frac{3}{6}=\frac{4}{8}=\frac{5}{10}=\frac{6}{12}\)b) \(\frac{25}{40}=\frac{5}{8}=\frac{10}{16}=\frac{15}{24}=\frac{20}{32}=\frac{30}{48}\)

c) \(\frac{18}{24}=\frac{3}{4}=\frac{6}{8}=\frac{9}{12}=\frac{12}{16}=\frac{15}{20}\)

a) \(\frac{1}{2}\) = \(\frac{2}{4}\) = \(\frac{3}{6}\) = \(\frac{4}{8}\) = \(\frac{5}{10}\) = \(\frac{6}{12}\)

b) \(\frac{25}{40}\) = \(\frac{5}{8}\) = \(\frac{10}{16}\) = \(\frac{15}{24}\) = \(\frac{20}{32}\) = \(\frac{30}{48}\)

c) \(\frac{18}{24}\) = \(\frac{3}{4}\) = \(\frac{6}{8}\) = \(\frac{9}{12}\) = \(\frac{12}{16}\) = \(\frac{15}{20}\)

Gọi số đó là A

Theo đề bài ta có

3A3=87xA

303+10xA=87xA

303=87xa-10xA

303=77xA

Ko có A thỏa mãn