Реши уравнение: а) 12,78x + 3,84x + 2,22x + 1,16x-0,3x = 197; б) 5,25x + 7,56x + 4,98x - 1,25x + 0,02x = 1,656; в) 0,75x + 3,8x + 0,25x + 1,2x + 9,84x = 15,84

Найдем х.

а) 12,78 * x + 3,84 * x + 2,22 * x + 1,16 * x - 0,3 * x = 197;

15 * x + 5 * x - 0.3 * x = 197;

20 * x - 0.3 * x = 197;

19.7 * x = 197;

x = 197/19.7;

x = 10.

б) 5,25 * x + 7,56 * x + 4,98 * x - 1,25 * x + 0,02 * x = 1,656;

4 * x + 5 * x + 7.56 * x = 1.656;

16.56 * x = 1.656;

x = 1.656/16.56;

x = 0.1.

в) 0,75 * x + 3,8 * x + 0,25 * x + 1,2 * x + 9,84 * x = 15,84;

1 * x + 5 * x + 9.84 * x = 15.84;

15.84 * x = 15.84;

x = 15.84/15.84;

x = 1.