Решить образцы 1) 15-4(d+3)=-17. 2) c-24=2c-18. 3) 3(n-3)+22=28. 4) 0.1x+1.2=2.3. 5)

Найдем корешки.

1) 15 - 4 * (d + 3) = -17; 

15 - 4 * d - 4 * 3 = -17; 

15 - 4 * d - 12 = -17;

3 - 4 * d = -17;

-4 * d = -17 - 3;

-4 * d = -20;

d = 20/4;

d = 5.

2) c - 24 = 2 * c - 18;

c - 2 * c = -18 + 24;

-c = 24 - 18;

-c = 6;

c = -6.

3) 3 * (n - 3) + 22 = 28; 

3 * (n - 3) = 28 - 22;

3 * (n - 3) = 6;

n - 3 = 6/3;

n - 3 = 2;

n = 2 + 3;

n = 5.

4) 0.1 * x + 1.2 = 2.3; 

0.1 * x = 2.3 - 1.2;

0.1 * x = 1.1;

1 * x = 11;

x = 11.

5) -8 * x - 8 = 34 - x; 

-8 * x + x = 34 + 8; 

-7 * x = 42; 

x = -42/7; 

x = -6; 

Ответ: х = -6.