Răspuns :

b=a-15

b=14-15

b= -1

c=a+26

c=14+26

c=40

a+b+c= 14 -1 + 40= 54-1= 53
a+b+c=?
a=14
b=a-15
c=26+a
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b=14-15
b=-1

c=26+14
c=40
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a+b+c=14+(-1)+40=53(numărul cautat)