Question

Tìm x,y,z biết:

x/2=y/3=z/4 và x+y=28

Answer 1

\(\frac{x}{2}=\frac{y}{3}=\frac{z}{4}\Rightarrow\frac{x+y+z}{2+3+4}=\frac{28}{9}\)

\(x=\frac{28.2}{9}=\frac{56}{9}\)

\(y=\frac{28.3}{9}=\frac{28}{3}\)

\(z=\frac{28.4}{99}=\frac{112}{9}\)

Answer 2

Ap dung tinh chat day cac ti so bang nhau ta co

x/2=y/3=z/4=x+y+z/2+3+4=28/9

Suy ra x=28/9.2=56/9

           y=28/9.3=28/3

           z=28/9.4=112/9