Question

VA ROG SUPER URGENT!!
14+21:{1+[a+(a:4-2).2]:7}=21
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Answer 1

Răspuns:

a=10

Explicație pas cu pas:

14+21:{1+[a+(a:4-2)·2]:7}=21

21:{1+[a+(a:4-2)·2]:7}=21-14

21:{1+[a+(a:4-2)·2]:7}=7

1+[a+(a:4-2)·2]:7=21:7

1+[a+(a:4-2)·2]:7=3

[a+(a:4-2)·2]:7=3-1

[a+(a:4-2)·2]:7=2

a+(a:4-2)·2=2·7

a+(a:4-2)·2=14

a+a:2-1=14

a+a:2=14+1

a+a:2=15    x2

2a+a=30

3a=30

a=30:3

a=10