Question

1100-[(128x4-144:x)x2]=172

Answer 1

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

Answer 2

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