solve the problem 5/n = 1.5/ 1.8
5/n=(3/2)/(5/5+4/5)5/n=(3/2)/(9/5)5/n=(3/2)*(5/9)5/n=15/18=5/65/n=5/630/n=55n=30Therefore: n=6.
\(\frac{5}{n} = \frac{1.5}{1.8} \ \ \ \Leftrightarrow\ \ \ 5\cdot1.8=1.5\cdot n \ \ \ \Leftrightarrow\ \ \ 9=1.5n\ /:1.5\\\ =6\)
