Решить уравнения: 1) x+0,5x=32) x+1/3x=123) x+3/4x=28

Найдем корни.

1) x + 0,5 * x = 3;

Приведем к виду a * x = b.

x * (1 + 0.5) = 3;

x * 1.5 = 3;

x * 3/2 = 3;

x * 3 = 2 * 3;

x * 3 = 6;

x = 6/3;

x = 2.

2) x + 1/3 * x = 12;

Умножим на 3.

x * 3 + 1/3 * x = 12 * 3;

3 * x + 1 * x = 36;

x * (3 + 1) = 36;

x * 4 = 36;

x = 36/4;

x = 9.

3) x + 3/4 * x = 28;

4 * x + 3/4 * 4 * x = 28;

4 * x + 3 * x = 28;

x * (4 + 3) = 28;

x * 7 = 28;

7 * x = 28;

x = 28/7;

x = 4.