Question

un stilou si un pix fac 15 lei.patru stilouri si 6 pixuri fac 66 lei.cati lei costa un stilou,dar un pix.

Answer 1

9+6=15
4x9+6x6=72

sau 8+7=15
4x8+7x6=74
 
sau 7+8=15
4x7+6x8=76

deci  e gresit enuntul

Answer 2

1pix.......1stilou.......15lei |×4
6pix.....4stilouri......66

4pix.......4st.........60lei
6pix.....4st.........66lei

66-60=2pix
1pix=6:2
1pix=3lei
1pix..1stlil....15llei
1stilou=15-1pix=13
R.1pix2lei,1stilou 13