y = k / x
We have to find the value of K
We only to replace y = 0,5 to y = 60
0,5 = k / 60
0, 5 ÷ 60 = k
30 = k
K = 30
Then,
y = 30 / x
Now us let's to replace y = 12
12 = 30 / x
12 . x = 30
x = 30 / 12
Division by 2
x = 15 / 6
Division by 3
x = 5 / 2
Or
x = 2,5
