Question

dau 10 p ex 6 va rog pana pe 11.03.2017 amiaza

Answer 1

y=5x/3
Inlocuind
2x/(3x +10x/3)=2x/(9x+10x)/3=2x:19x/3=6x/19x=6/19

Answer 2

$\frac{x}{y} = \frac{3}{5} Inpartind la y se obtine$$\frac{2x}{3x+2y}= \frac{ \frac{2x}{y} }{ \frac{3x}{y} +2} = \frac{2* \frac{3}{5} }{3* \frac{3}{5}+2 } = \frac{ \frac{6}{5} }{ \frac{9+10}{5} } = \frac{16}{19}$