Question

Intr-o remorca sunt 330 de scanduri de brad si de fag. Scandurile de fag cantaresc, in total, cu 220 de kg mai putin decat scandurile de brad. Daca o scandura de brad are 5,6 kg,iar o scandura de fag 9,2 kg, aflati cate scanduri de brad si de fag sunt in remorca

Answer 1

x-scanduri brad
y-scanduri fag
x+y=330   ,x=330-y
5,6x-220=9,2y
5,6(330-y)-220=9,2y
1848 -5,6y-220=9,2y
14,8y=1628
y=110
x=220