Răspuns:
Intr-o livada sunt 4 randuri cu 90 de piersici . Afla cati pomi sunt pe fiecare rand , stiind ca sunt numere consecutive .
[tex]a./.../\\\\b./.../+1/\\\\c./.../+2/\\\\d./.../+3/\\--------\\90-suma\\\\1+2+3=6-segm.egale\\\\90-6=84\\\\84:4=21-(a)\\\\21+1=22-(b)\\\\21+2=23-(c)\\\\21+3=24-(d)[/tex]