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daca intr-o clasa stau cate 2 elevi intr-o banca raman 4 elevi in picioare iar daca stau cate 3 elevi raman raman 2 banci libere . Cate banci si cati elevi sunt?

Răspuns :


E=2B+4
E=3b-3-3

2B+4=3B-6
B=10
E=10*2+4=24
[tex]Notam~e = elevi[/tex]
[tex]Notam ~b=banci[/tex]
[tex]e=2b+4[/tex]
[tex]e=3b-3-3[/tex]
[tex]2b+4=3b-6[/tex]
[tex]3b-2b=6+4[/tex]
[tex]\boxed{b=10}[/tex]
[tex]e=10*2+4[/tex]
[tex]e=10+4[/tex]
[tex]\boxed{e=24}[/tex]