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}.
[tex] \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[/tex]
