Решите уравнения: а) 11+2x=55+3x b) - 15-3x=-7x+45 в) - 3x-17=8x-105 г) 2 (2+y) = 19-3y д) (4-c) + 2 (c-3) = -13 e) - 3 (3b+1) - 12=12

Вычислим корни.

а) 11 + 2 * x = 55 + 3 * x;

2 * x - 3 * x = 55 - 11;

-x = 44;

x = - 44.

b) - 15 - 3 * x = - 7 * x + 45;

-3 * x + 7 * x = 45 + 15;

4 * x = 60;

x = 60/4;

x = 15.

в) - 3 * x - 17 = 8 * x - 105;

-3 * x - 8 * x = - 105 + 17;

-11 * x = - 88;

11 * x = 88;

x = 88/11;

x = 8.

г) 2 * (2 + y) = 19 - 3 * y;

2 * 2 + 2 * y = 19 - 3 * y;

4 + 2 * y = 19 - 3 * y;

2 * y + 3 * y = 19 - 4;

5 * y = 15;

y = 15/5;

y = 3.

д) (4 - c) + 2 * (c - 3) = - 13;

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

c - 2 = - 13;

c = - 13 + 2;

c = - 11.

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

3 * b + 1 = - 24/3;

3 * b = - 8 - 1;

3 * b = - 9;

b = - 9/3;

b = - 3.