( n - 10, 5 ) × 4 + 3, 7 = 41, 7
( n - 10, 5 ) × 4 = 41, 7 - 3, 7
( n - 10, 5 ) × 4 = 38
n - 10, 5 = 38 : 4
n - 10, 5 = 9, 5
n = 9, 5 + 10, 5
n = 20
3 / 5 din n = 3 / 5 × 20 = 60 / 5 = 12
10 % din x = n
10 / 100 × x = 20
x = 20 × 100 : 10
x = 2000 : 10
x = 200