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a fost răspuns

15 + 5 x { 5 + 5 : [ 45 : 5 - ( 36 : a + 4 x 1 ) ] + 6 x 0 } = 65

Răspuns :

Cristinatibulca
15+5x{5+5:[9-(36:a+4}]+0}=65

5x[5+5:(9-36:a-4)]=65-15
5x[5+5:(9-36:a-4)]=50  I:5
[5+5:(9-36:a-4)]=10
5:(9-36:a-4)=5 Ix5
9-36:a-4=1
4=36a. a=9

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