Răspuns :
[ ( 1 + 2 × 3 ) : a + 5 ] : 6 = 9 : 9
[ ( 1 + 6 ) : a + 5 ] : 6 = 1
7 : a + 5 = 1 × 6
7 : a + 5 = 6
7 : a = 6 - 5
7 : a = 1
a = 7 : 1
a = 7
[ ( 1 + 6 ) : a + 5 ] : 6 = 1
7 : a + 5 = 1 × 6
7 : a + 5 = 6
7 : a = 6 - 5
7 : a = 1
a = 7 : 1
a = 7
Răspuns:
Explicație pas cu pas:
[ ( 1 + 2 × 3 ) : a + 5 ] : 6 = 9 : 9
[ ( 1 + 6 ) : a + 5 ] : 6 = 1
7 : a + 5 = 1 × 6
7 : a + 5 = 6
7 : a = 6 - 5
7 : a = 1
a = 7 : 1
a = 7 → numarul, aflat prin metoda mersului invers
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Verific:
( 7 : 7 + 5 ) : 6 = 6 : 6 = 1