Номер 580

10 · y = 120;
y = 120 : 10;
y = 12;
10 · 12 = 120;
120 = 120.

z : 6 = 10;
z = 10 · 6;
z = 60;
60 : 6 = 10;
10 = 10.

x : 10 = 5;
x = 5 · 10;
x = 50;
50 : 10 = 5;
5 = 5.