Question

Va rog ajutatima...
Dau 100 puncte...

1. 25-(2:(12-9)+42:7ori 3)=

2. 16+2(72:8+75:5)ori 3+21=


Va rog frumos ajutatima....

Answer 1

1) 25-(2:3+6*3)= 25-2:3-18 = 7-2:3 = $\frac{7}{1} - \frac{2}{3}$ 
amplificam $\frac{7}{1}$ cu 3
$\frac{21}{3} - \frac{2}{3}$ = $\frac{19}{3}$
2) 16+2(9+15)*3+21 = 16+2*24*3+21= 37+6*24 = 37+144 = 181