Как решить уравнение (4x+3) - (10x+11) = 7x (13-4x) и (2x+3) - (5x+11) = 7x (13-2x)

(2x+3) - (5x+11) = 7 + (13-2x);

2x+3-5x-11=7+13-2x;

2x-5x+2x=7+13-3+11;

-x=28;

x=-28

1) (4 * x + 3) - (10 * x + 11) = 7 * x * (13 - 4 * x);

4 * x + 3 - 10 * x - 11 = 91 * x - 28 * x^2;

-6 * x - 8 = 91 * x - 28 * x^2;

28 * x^2 - 97 * x - 8 = 0;

D = 9409 + 896 = 10305;

x1 = (97 - 10305^ (1/2)) / 56;

x2 = (97 + 10305^ (1/2)) / 56;

2) (2 * x + 3) - (5 * x + 11) = 7 * x (13 - 2 * x);

-3 * x - 8 = 91 * x - 14 * x^2;

14 * x^2 - 94 * x - 8 = 0;

7 * x^2 - 47 * x - 4 = 0;

D = 2209 + 112 = 2321;

x1 = (47 - 2321^ (1/2)) / 14;

x2 = (47 + 2321^ (1/2)) / 14.