X*12=72 72:X=12 72:2=х 25*X=150 150:Х=25 150:25=Х x*54=270 270:х=54 270:52-Х

Решим уравнения и найдем их корешки.

1) X * 12 = 72; 

х = 72\12; 

х = 6; 

2) 72 : X = 12; 

12 * х = 72;

ч = 72\12;

х = 6;ж

3) 72 : 2 = х; 

2 * х = 72;

х  = 72\2;

х = 36;

4) 25 * X = 150; 

x = 150/25;

x = 30/5;

x = 6;

5) 150 : Х = 25; 

25 * x = 150;

x = 150/25;

x = 6;

7) 150 : 25 = x; 

25 * x= 150;

x = 150/25;

x = 6;

8) x * 54 = 270; 

x = 270/54;

x = 30/6;

x = 6;

9) 270 : х = 54; 

54 * x = 270;

x = 6;

10) 270 : 52 = Х; 

x = 135/26.