Решительно уравнение 4 х-15 (2+3 х) = 7-24 х. ¾х-1½+1/5 х=1⅔. 9 х+4 (7y-1) = 32-8 у. 3⅓-⅔х=5,4+0,2

Вычислим корни.

1) 4 * х - 15 * (2 + 3 * х) = 7 - 24 * х;

Раскроем скобки.

4 * x - 15 * 2 - 15 * 3 * x = 7 - 24 * x;

4 * x - 30 - 45 * x = 7 - 24 * x;

-41 * x - 30 = 7 - 24 * x;

-41 * x + 24 * x = 7 + 30;

-17 * x = 37;

x = - 37/17.

2) ¾ * х - 1 ½ + 1/5 * х = 1 ⅔;

¾ * x + 1/5 * x = 1 2/3 + 1 ½;

¾ * x + 3/2 * x = 5/3 + 3/2;

3 * 3 * x + 3 * 6 * x = 5 * 4 + 3 * 6;

9 * x + 18 * x = 20 + 18;

27 * x = 38;

x = 38/27.

3) 9 * y + 4 * (7 * y - 1) = 32 - 8 * у;

9 * y + 28 * y - 4 = 32 - 8 * y;

37 * y - 4 = 32 - 8 * y;

37 * y + 8 * y = 32 + 4;

45 * y = 36;

y = 36/45;

y = 4/5;

y = 0.4.

4) 3 ⅓ - ⅔ * х = 5,4 + 0,2;

10/3 - 2/3 * x = 5.6;

10/3 - 2/3 * x = 5 3/5;

10/3 - 2/3 * x = 28/5;

10 * 5 - 2 * x * 5 = 28 * 3;

50 - 10 * x = 78;

-10 * x = 78 - 50;

-10 * x = 28;

x = - 28/10;

x = - 2.8.