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determina numerele a,b,c,stiind ca: a+2*b+3*c=19

Răspuns :

a+2a+3a=19
5a=20
a=4
4+2b+3b=19
5b=19-4
5b=15
b=3
4+6+3c=19
c=19-10/3
c=9:3
c=3
verificare 4+2*3+3*3=19
4+6+9=19-corect