Question

1) 14 : z = 7/15
2) 2 / x = 5/9

Answer 1

1) 14 : z = 7/15
     z = 14 : 7/15
     z = 30
-----------------------
2) 2/x = 5/9
    5x = 2*9
    5x = 18
      x = 3,6

Answer 2

1) z=14*15/7=30
2) x=2*9/5=18/5 (3.6)
=====================