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a fost răspuns

afla produsul nr a,b,c stiind ca a+b=31, a+c=26,b+c=23

Răspuns :

a+b+a+c+b+c=31+26+23
2a+2b+2c=80
2(a+b+c)=80
a+b+c=40
31+c=40
c=9
a+23=40
a=17
b+26=40
b=14
17x14x9=2142
Putinelugeorge
a+b+a+c+b+c=31+26+23
2a+2b+2c=80
2X(a+b+c)=80
a+b+c=40
31+c=40
c=9
a+23=40
a=27
b+26=40
b=14
17X14X9=2142

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