Răspuns :
5U+2P=300
3U+2p=220-ii scadem
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2U=80lei=>U=80:2=>U=40 lei
3U+2P=220
(3×40)+2P=220
2P=220-120=>2P=100
P=100:2=>P=50 lei
3U+2p=220-ii scadem
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2U=80lei=>U=80:2=>U=40 lei
3U+2P=220
(3×40)+2P=220
2P=220-120=>2P=100
P=100:2=>P=50 lei