Question

Tìm a : a/2+ a/3+ a/4 +2890= 3528

Answer 1

\(\frac{a}{2}+\frac{a}{3}+\frac{a}{4}+2890=3528\)

\(\Rightarrow\frac{a}{2}+\frac{a}{3}+\frac{a}{4}=638\)

\(\Rightarrow a\left(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}\right)=638\)

\(\Rightarrow a.\frac{13}{12}=638\)

\(\Rightarrow a=638:\frac{13}{12}\)

\(\Rightarrow a=638.\frac{12}{13}\)

\(\Rightarrow a=\frac{7656}{13}\)