Question

12 + [ 32 : 8+2 x (3 x 5-a)-12:2]: 2 = 15
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Answer 1

Răspuns:

Explicație pas cu pas:

12 + [ 32 : 8+2 x (3 x 5-a)-12:2]: 2 = 15

[ 32 : 8+2 x (3 x 5-a)-12:2]: 2 = 15 - 12 = 3

32 : 8+2 x (3 x 5-a)-12:2 = 3 x 2 = 6

4 + 2 x (3 x 5a) - 6 = 6

2 x (3 x 5a) = 6 + 6 - 4 = 8

3 x 5a = 8 : 2 = 4

5a = 4/3

a = 4/15

Answer 2

12+[4+2×(15-a)-6]:2=15

4+2×(15-a)-6:2=13

2×(15-a)-3=13+4

(15-a)-3=17×2

15-a=34+3

a=37+15

a=52