Question

1)Aflati x si y stiind ca x supra 7=y supra 3 si x+y=50
2)Stiind ca a supra 0,1 = 20 supra b calculati 17+a*b

Answer 1

1)[tex] \frac{x}{7}= \frac{y}{3 } ;si:x+y=50 \\ x= \frac{7y}{3}; si: \frac{7y}{3}+y=50 \\ 10y=150 \\ y=15;x=7*15/3=35 [/tex]
$\frac{a}{0,1}= \frac{20}{b} \\ ab=2 \\ 17+ab=17+2=19$