1)2,6- 8 х= 4 2)1цел 3/4 : х = 2 цел

Решим уравнения:

1) 2,6 - 8 * х = 4; 

2.6 - 8 * x = 4;

2.6 - 8 * x = -4;

-8 * x = 4 - 2.6;

-8 * x = -4 - 2.6;

-8 * x = 1.4;

-8 * x = -6.6;

8 * x = -1.4;

8 * x = 6.6;

x = -1.4/8;

x = 6.6/8;

x = -0.7/4;

x = -3.3/4;

x = -7/40;

x = -33/40.

2) 1 3/4 : х = 2 3/5 : 10; 

7/4 : x = 13/5 : 10; 

7/4 * 1/x = 13/5 * 1/10; 

7/(4 * x) = 13/(50); 

7/(2 * x) = 13/25; 

2 * 13 * x = 25 * 7; 

26 * x = 175; 

x = 175/26.