Răspuns :
x:6x5=35:7
x:6x5=5
x:6=5:5
x:6=1
x=1x6
x=6
proba:
6:6x5=35:7
1x5=5
5=5, deci adevarat, numarul este 6.
x:6x5=5
x:6=5:5
x:6=1
x=1x6
x=6
proba:
6:6x5=35:7
1x5=5
5=5, deci adevarat, numarul este 6.