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 корни.

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.