Question

Dau coroana! Urgent!!

Answer 1

Răspuns:

Explicație pas cu pas:

toata sum este   x

l )   0.2x+6

ll ) 0.4*(x-(2x+6))+4 =0.4x-0.08x-2.4+4 = 0.32x+1.6

lll ) 50

x= 50+0.32x+1.6+0.2x+6 = 0.52x+57.6  => x(1-0.52)=57.6

0.48x=57.6   48x= 5760   => x=120lei

b)  ll = 0.32*120+1.6 = 38.4 +1.6=40lei

c) pr (l+ll) =100 * (40+0.2*120+6)/120 = 100 * 70/120 = 100*0.58(3) = ~58 %