[( j - 25 ) × 64 - 12 ] : 4 : 5 = 25
[( j - 25 ) × 64 - 12 ] : 4 = 25 x 5
[( j - 25 ) × 64 - 12 ] : 4 = 125
( j - 25 ) × 64 - 12 = 125 x 4
( j - 25 ) × 64 - 12 = 500
( j - 25 ) × 64 = 500 + 12
( j - 25 ) × 64 = 512
j - 25 = 512 : 64
j - 25 = 8
j = 8 + 25
j = 33 → numarul aflat prin metoda mersului invers
