Răspuns :
x-cantitatea initiala
3/10 din x= 3/10 * x= 3x/10 -prima data
x- 3x/10 = (10x-3x)/10= 7x/10 -restul
0,8=8/10=4/5
4/5 din 7x/10= 4/5 * 7x/10= 14x/25 -a doua oara
7x/10 -14x/25= (35x-28x)/50= 7x/50 -noul rest
7x/50=252
x=50*252/7
x=50*36
x=1800
3/10 din x= 3/10 * x= 3x/10 -prima data
x- 3x/10 = (10x-3x)/10= 7x/10 -restul
0,8=8/10=4/5
4/5 din 7x/10= 4/5 * 7x/10= 14x/25 -a doua oara
7x/10 -14x/25= (35x-28x)/50= 7x/50 -noul rest
7x/50=252
x=50*252/7
x=50*36
x=1800
Notam cu x=cantitatea initiala de marfa din depozit
In prima zi au ramas:
x-x*3/10=x*7/10
A doua zi au ramas:
(x*7/10)(1-8/10)=252
(x*7/10)*2/10=252
(x*7/10)*1/5=252
x=252*10*5/7=36*50=1800 tone erau la inceput
In prima zi s-au livrat 1800*3/10=180*3=540 tone, ramanand 1800-540=1260 t,
iar a doua zi s-au livrat 1260*4/5=1008 t, deci in total
1260+1008=2268 t
In prima zi au ramas:
x-x*3/10=x*7/10
A doua zi au ramas:
(x*7/10)(1-8/10)=252
(x*7/10)*2/10=252
(x*7/10)*1/5=252
x=252*10*5/7=36*50=1800 tone erau la inceput
In prima zi s-au livrat 1800*3/10=180*3=540 tone, ramanand 1800-540=1260 t,
iar a doua zi s-au livrat 1260*4/5=1008 t, deci in total
1260+1008=2268 t