(24-y)*5-32=48. 720:(c:7+80)=6
(24-у)*5-32=48 (24-у)*5=48+32 (24-у)*5=80 24-у=80:5 24-у=16 у=24-16 у=8
720:(с:7+80)=6 (с:7+80)=720:6 (с:7+80)=120 с:7=120-80 с:7=40 с=40*7 с=280