Question

olivia are cu 8 bile mai putine decat mioara.
cate bileare fiecare,stiindca impreuna au 18 bile

Answer 1

y= olivia
z=mioara
y+8=z
y+z=18
y+y+8=18
2y+8=18
2y=18-8
2y=10
y=10:2=5
z=5+8
z=13