1 100 - [ ( 128 × 4 - 144 : x ) × 2 ] = 172
( 512 - 144 : x ) × 2 = 1 100 - 172
( 512 - 144 : x ) × 2 = 928
512 - 144 : x = 928 : 2
512 - 144 : x = 464
144 : x = 512 - 464
144 : x = 48
x = 144 : 48
x = 3 → numarul, aflat prin metoda mersului invers
1100-[(128*4-144:x)*2]=172
(512-144:x)*2=1100-172
(512-144:x)*2=928
512-144:x=928:2
512-144:x=464
144:x=512-464
144:x=48
x=144:48
x=3
