Răspuns: x = 8
Explicație pas cu pas:
[( x × 9 - 63 ) × 8 - 48] : 3 + 8 = 16
[( x × 9 - 63 ) × 8 - 48 ] : 3 = 16 - 8
[( x × 9 - 63 ) × 8 - 48] : 3 = 8
( x × 9 - 63 ) × 8 - 48 = 8 × 3
( x × 9 - 63 ) × 8 - 48 = 24
( x × 9 - 63 ) × 8 = 24 + 48
( x × 9 - 63 ) × 8 = 72
x × 9 - 63 = 72 : 8
x × 9 - 63 = 9
x × 9 = 9 + 63
x × 9 = 72
x = 72 : 9
x = 8 → numarul, aflat prin metoda mersului invers