Question

Daca 2a-b supra 5a+3b=1 supra 2,atunci raportul a supra b este egal cu...
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Answer 1

$\frac{2a-b}{5a+3b} = \frac{1}{2} \ \textless \ =\ \textgreater \ 2(2a-b)=5a+3b =\ \textgreater \ 4a-2b=5a+3b$
4a-5a=2b+3b
-a=5b sau a=-5b =>
$\frac{a}{b} =(-5)$