1) 69899-60809=9090 x+y=9+0+9+0=18 daca nr nu are cifre distincte
67869-60819=7050 x+y=7+0+6+1=14 daca nr are cifre distincte
2) 1/5a=36 a=3x36=180
3/4x180=135
raspuns=135
3)
a-b=1280
b=3x1280=3840
a=3840+1280=5120
4)
m+n+p=2144
(m+n+581):2=1000 m+n+581=1000x2=2000 m+n=2000-581=1419
m+p-568=1000 m+p=1000+568=1568
p=2144-1419=725
m=1568-725=843
n=2144-1568=576
5)
6053: a=7 rest 5
a=(6053-5):7=6048:7=864