Question

problema nr 4 va rog..

Answer 1

f-preț de fabricație
f+16%f+24%f=280
100f/100 +16f/100+24f/100=280
140f/100=280
140f=280*100
f=280*100/140
f=2*100
f=200

Answer 2

280 = x + 16%x + 24%x = x + 40%x = x + 40x/100 = x + 2x/5 = 7x/5

280 = 7x/5 <=> 7x = 280*5 = > 7x = 1400 => x = 1400:7 => x = 200 lei

x = pretul de fabricatie.