Решите уравнения 5-2y=y+8 1,2x+5,5=0,1x 12+7x=2x+15-13 12,1x-7x=12,1x+28,7

Найдем корешки.

1) 5 - 2 * y = y + 8; 

-2 * y - y = 8 - 5; 

-3 * y = 3;

y = -3/3;

y = -1.

2) 1,2 * x + 5,5 = 0,1 * x; 

1.2 * x - 0.1 * x = -5.5;

1.1 * x = -5.5;

x = -5.5/1.1;

x = -5.

3) 12 + 7 * x = 2 * x + 15 - 13; 

12 + 7 * x = 2 * x + 2;

7 * x - 2 * x = 2 - 12;

5 * x = -10;

x = -10/5;

x = -2.

4) 12,1 * x - 7 * x = 12,1 * x + 28,7; 

12.1 * x - 7 * x - 12.1 * x = 28.7; 

-7 * x = 28.7; 

x = -28.7/7; 

x = -4.1.