Решите четыре уровнения 1) 17 (5+x) - 20x=8x-14 2) 24x-12 (7+x) = 16-8x 3) 29+14 (9-y) = 19-2y 4) - 15 (4y-3) + 37y=42y-111

Вычислим корни.

1) 17 * (5 + x) - 20 * x = 8 * x - 14;

Раскроем скобки.

17 * 5 + 17 * x - 20 * x = 8 * x - 14;

85 - 17 * x - 20 * x = 8 * x - 14;

Приведем подобные.

85 - 3 * x = 8 * x - 14;

-3 * x - 8 * x = - 14 - 85;

-11 * x = - 99;

x = 99/11;

x = 9.

2) 24 * x - 12 * (7 + x) = 16 - 8 * x;

24 * x - 84 - 12 * x = 16 - 8 * x;

12 * x - 84 = 16 - 8 * x;

12 * x + 8 * x = 16 + 84;

20 * x = 100;

x = 100/20;

x = 5.

3) 29 + 14 * (9 - y) = 19 - 2 * y;

29 + 126 - 14 * y = 19 - 2 * y;

155 - 14 * y = 19 - 2 * y;

-12 * y = 19 - 155;

12 * y = 136;

y = 136/12;

y = 34/3.

4) - 15 * (4 * y - 3) + 37 * y = 42 * y - 111;

-60 * y + 45 + 37 * y = 42 * y - 111;

-23 * y + 45 = 42 * y - 111;

-23 * y - 42 * y = - 111 - 45;

65 * y = 156;

y = 156/65;

y = 2.4.