Question

14 +{4×[28+(a+2):6]-5}:5=37

Answer 1

14 + { 4 × [ 28 + ( a + 2 ) : 6 ] - 5 } : 5 = 37

{ 4 × [ 28 + ( a + 2 ) : 6 ] - 5 } : 5 = 37 - 14 = 23

4 × [ 28 + ( a + 2 ) : 6 ] - 5 = 23 × 5 = 115

4 × [ 28 + ( a + 2 ) : 6 ] = 115 + 5 = 120

28 + ( a + 2 ) : 6 = 120 : 4

28 + ( a + 2 ) : 6 = 30

( a + 2 ) : 6 = 30 - 28

a + 2 = 2 × 6

a + 2 = 12

a = 12 - 2

a = 10 → numarul, aflat prin metoda mersului invers