Răspuns :
Răspuns:
Explicație pas cu pas:
C = cantitatea vanduta
Prima zi 5C/13
Rest C - 5C/13 = 13C/13 - 5C/13 = 8C/13
A doua zi 5/8 * 8C/13 = 5C/13
Rest 8C/13 - 5C/13 = 3C/13
3C/13 = 90 kg
C = 13*90/3 = 390 kg
Răspuns:
5x/13 a vandut in prima zi
x-5x/13=8x/13 rest
8x/13·5/8=40x/104 se simplifica cu 8 =5x/13 a vandut a2a zi
5x/13+5x/13+90=x
5x+5x+1170=13x
1170=13x-10x
1170=3x
x=1170:3
x=390 cantitatea initiala de zahar
5/13 din 390=390·5:13=150 kg in prima zi
390-150=240 rest
5/8 din 240=5·240:8=150 kg vandute a2a zi
verificare : 150+150+90=390 kg zahar