Question

Va roggggg plZ am nevoie mare

Answer 1

$25)~\frac{a}{10}=\frac{1,5}{b}=\frac{2\frac{1}{2}}{40}$
$\frac{a}{10}=\frac{1,5}{b}=\frac{\frac{3}{2}}{40}$
$\frac{a}{10}=\frac{1,5}{b}=\frac{3}{2\cdot40}$
$\frac{a}{10}=\frac{1,5}{b}=\frac{3}{80}$
$a=10\cdot\frac{3}{80}=\frac{30}{80}=\frac{3}{8}$
$b=\frac{1,5}{\frac{3}{80}}=\frac{1,5\cdot80}{3}=\frac{120}{3}=40$