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.