Question

9 porci si 10 gaini consuma intr-o saptamana 82 kg de graunte,iar 9 porci si 5 gaini consuma 77 kg de graunte.cate kg graunte consuma un porc si cate o gaina

Answer 1

9p+10g=82
9p+5g=77
5g=82-77
5g=5kg
1g=5:5=1kg consuma o gaina pe saptamana

9p-10x1=82
9=82-10=72
9p=72:9=8 kg pe saptamana consuma un porc