Răspuns:
inmultesti a doua relatie cu 2 ,pentru a avea un numar comun:
3cuburi............8bile.........155g
4cuburi............4bile.........180g
180-155=25g
4-3=1
1cub are 25g
3cuburi au(3×25=75g)
aflam cat are o bila:
155-75=80
80g:8bile=10g are o bila
v:3×25+10×8=75+80=155
1cub=25g
1bila=10g
am lucrat corect
