Решите уравнения 1.2 (2+у) = 19-3 у 2. (4-с) + 2 (с-3) = -13 3.-3 (3b+1) - 12=12 4.3x=15 5.4x-2=14 6.3x+x+2=18 7.3x-12=x 8.4x-2=2x+6 9.2x-2=6+4x 10.2x+6=4x-2 11.-4x-4=2x+8

Вычислим корни:

1. 2 * (2 + у) = 19 - 3 * у;

Раскроем скобки.

4 + 2 * y = 9 - 3 * y;

2 * y + 3 * y = 9 - 4;

Приведем к виду a * x = b.

5 * y = 5;

y = 5/5;

y = 1.

2. (4 - с) + 2 * (с - 3) = - 13;

4 - c + 2 * c - 6 = - 13;

c - 2 = - 13;

c = - 13 + 2;

c = - 11.

3. - 3 * (3 * b + 1) - 12 = 12;

-3 * (3 * b + 1) = 24;

3 * b + 1 = - 8;

3 * b = - 9;

b = - 9/3;

b = - 3.

4. 3 * x = 15;

x = 15/3;

x = 5.

5. 4 * x - 2 = 14;

4 * x = 16;

x = 16/4;

x = 4.

6. 3 * x + x + 2 = 18;

4 * x = 16;

x = 4.

7. 3 * x - 12 = x;

2 * x = 12;

x = 6.

8. 4 * x - 2 = 2 * x + 6;

2 * x = 8;

x = 4.

9. 2 * x - 2 = 6 + 4 * x;

-2 * x = 8;

x = - 4.

10. 2 * x + 6 = 4 * x - 2;

-2 * x = - 8;

x = 4.

11. - 4 * x - 4 = 2 * x + 8;

-6 * x = 12;

x = - 2.