решите уравнение: (2 х-5) - (3 х-7) = 4,5 (х-1,2) - 3 х=2

Вычислим корни.

1) (2 * х - 5) - (3 * х - 7) = 4;

Упростим.

2 * x - 5 - 3 * x + 7 = 4;

2 * x - 3 * x + 7 - 5 = 4;

2 * x - 3 * x + 2 = 4;

-x + 2 = 4;

-x = 4 - 2;

x = - 4 + 2;

x = - 2.

2) 5 * (х - 1,2) - 3 * х = 2;

5 * x - 5 * 1.2 - 3 * x = 2;

5 * x - 6 - 3 * x = 2;

2 * x - 6 = 2;

2 * x = 2 + 6;

2 * x = 8;

x = 8/2;

x = 4.