Question

Exercitiul 2 (A,b)
Pls

Answer 1

a)17>2x-1

18>2x

x<9

2x-1>0

2x>1

x>1/2

Deci x={1,2,3,4,5,6,7,8}.

$\frac{y}{27} = \frac{8}{12} \\ \frac{y}{27} = \frac{4 \times 2}{4 \times 3} \\ \frac{y}{27} = \frac{2}{3} \\ \frac{y}{27} = \frac{2 \times 9}{3 \times 9} \\ \frac{y}{27} = \frac{18}{27} \\ y = 18$