Question

Daca 2a plus 3b supra4b plus15a egal 0,(3).afla asupra b

Answer 1

$\frac{2a+3b}{4b+15a} = \frac{3}{9}$

$\frac{2a+3b}{4b+15a} = \frac{1}{3}$

3(2a+3b)=4b+15a
6a+9b=4b+15a
9b-4b=15a-6a
5b=9a⇒$\frac{a}{b}= \frac{5}{9}$