Question

1+{2+[3+(4+a):5]-6}×7=15​

Answer 1

Răspuns:

11

Explicație pas cu pas:

{2 + [3 + (4 + a) : 5] - 6} * 7 = 15 - 1

{2 + [3 + (4 + a) : 5] - 6} * 7 = 14

2 + [3 + (4 + a) : 5] - 6 = 14 : 7

2 + [3 + (4 + a) : 5] - 6 = 2

2 + [3 + (4 + a) : 5] = 2 + 6

2 + [3 + (4 + a) : 5] = 8

3 + (4 + a) : 5 = 8 - 2

3 + (4 + a) : 5 = 6

(4 + a) : 5 = 6 - 3

(4 + a) : 5 = 3

4 + a = 3 * 5

4 + a = 15

a = 15 - 4

a = 11