➳ Rezolvare:
[ 3 + ( a + 2 ) : 2 ] × 4 - 8 = 32
[ 3 + ( a + 2 ) : 2 ] × 4 = 32 + 8
[ 3 + ( a + 2 ) : 2 ] × 4 = 40
[ 3 + ( a + 2 ) : 2 ] = 40 : 4
[ 3 + ( a + 2 ) : 2 ] = 10
( a + 2 ) : 2 = 10 - 3
( a + 2 ) : 2 = 7
a + 2 = 7 × 2
a + 2 = 14
a = 14 - 2
a = 12 → rezultatul obținut
Verificare:
[ 3 + ( 12 + 2 ) : 2 ] × 4 - 8 =
= ( 3 + 14 : 2 ) × 4 - 8 =
= ( 3 + 7 ) × 4 - 8 =
= 10 × 4 - 8 =
= 40 - 8 =
= 32 ✓
