1) 33x-8 (3x-2) = -7x-5x (12-3x) 2) 0.15 (x-4) = 9.9-0.3 (x-1)

1) 33 * x - 8 * (3 * x - 2) = - 7 * x - 5 * x * (12 - 3 * x);

Раскроем скобки и приведем подобные значения.

33 * x - 24 * x + 16 = 7 * x - 60 * x + 15 * x^2;

7 * x + 16 = 7 * x - 60 * x + 15 * x^2;

16 = - 60 * x + 15 * x^2;

15 * x^2 - 60 * x - 16 = 0;

x1 = 2 - 2/15√ 285;

x2 = 2 - 2/15√ 285.

2) 0.15 * (x - 4) = 9.9 - 0.3 * (x - 1);

0,15 * x - 0.6 = 9.9 - 0.3 * x + 0.3;

0.15 * x - 0.6 = 1.2 - 0.3 * x;

0.15 * x + 0.3 * x = 1.2 + 0.6;

0.45 * x = 1.8;

x = 1.8/0.45;

x = 4.