30*(60+а)=4500 120-40/k=40 (300-n)/20=9 70*x-150=60 - вопрос №7051947306045001204040300209701506056003602080 от roman19781975 10.06.2021 15:55

Question

Математика: 30*(60+а)=4500 120-40/k=40 (300-n)/20=9 70*x-150=60 5600/(360/k-20)=80

roman19781975 · Answer

30*(60+а)=450060+a = 150a = 150-60a = 90120-40/k=4040/k = 120-4040/k = 80k = 80:40k = 1/2(300-n)/20=9300-n = 180n = 300-180n = 12070*x-150=6070x = 60+15070x = 210x = 35600/(360/k-20)=80360/k-20=5600/80360/k-20 = 70360/k = 70+20360/k = 90k = 360/90k = 4...