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Sebastianseby
a fost răspuns

Daca 3a +2b+4c=494 si b+2c=160,calculati a si ab+2ac

Răspuns :

Renatemambouko
3a +2b+4c=494    3a+2(b+2c)=494  3a+2*160=494  3a=494-320  3a=174 a=58
b+2c=160


 a=58
ab+2ac =a*(b+2c)=58*160=9280

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