Условие:

Реши уравнения.
x : 20 = 40 * 3;
210 : x = 420 : 6;
x * 110 = 110;
480 : x = 480;
x − 260 = 0;
y + 0 = 300.

x : 20 = 40 * 3
x : 20 = 120
x = 120 * 20
x = 2400
 
210 : x = 420 : 6
210 : x = 70
x = 210 : 70
x = 3
 
x * 110 = 110
x = 110 : 110
x = 1
 
480 : x = 480
x = 480 : 480
x = 1
 
x − 260 = 0
x = 0 + 260
x = 260
 
y + 0 = 300
y = 300 − 0
y = 300