Question

Cantitatea de 940 kg de struguri se pun in ladite si lazi,in total 95 de bucati.Stiind ca in orice ladita s-au pus 7 kg si in orice lada s-au pus 12 kg , calculati cate ladite au fost.

Answer 1

x+y=95
7x+12y=940
x=95-y
7(95-y)+12y=940
665-7y+12y=940
5y=940-665
5y=275
y=275/5
y=55
x=95-55
x=40
40ladite
55 lazi

Answer 2

x=nr ladite y=nr lazi      x+y=95⇒y=95-x 7x+12y=940  7x+12*95-12x=940    1140-940=5x x=200:5= 40 ladite iar y=95-40=55 lazi