Question

27 - (n.24 +1):7 = 20 ​

Answer 1

Răspuns:  n = 2

Explicație pas cu pas:

27 - ( n × 24 + 1 ) : 7 = 20

( n × 24 + 1 ) : 7 = 27 - 20

( n × 24 + 1 ) : 7 = 7

n × 24 + 1 = 7 × 7

n × 24 + 1 = 49

n × 24 = 49 - 1

n × 24 = 48

n = 48 : 24

n = 2 -> numarul, aflat prin metoda mersului invers

Answer 2

27 - ( n × 24 + 1 ) : 7 = 20

( n × 24 + 1 ) : 7 = 27 - 20

( n × 24 + 1 ) : 7 = 7

n × 24 + 1 = 7 × 7

n × 24 + 1 = 49

n × 24 = 49 - 1

n × 24 = 48

n = 48 : 24

n = 2