Решите уравнения2 (х-7) = 35 (х-9) = -23=4 (х+2) - 7=5 (х+5) 9=5 (х+9)

Найдем х в уравнениях:

1) 2 * (х - 7) = 3;

Раскроем скобки.

2 * x - 2 * 7 = 3;

2 * x - 14 = 3;

2 * x = 3 + 14;

2 * x = 17;

x = 17/2;

x = 8.5.

2) 5 * (х - 9) = - 2;

5 * x - 5 * 9 = - 2;

5 * x - 45 = - 2;

5 * x = - 2 + 45;

5 * x = 43;

x = 43/5.

3) 3 = 4 * (х + 2);

3 = 4 * x + 4 * 2;

4 * x + 8 = 3;

4 * x = 3 - 8;

4 * x = - 5;

x = - 5/4.

4) - 7 = 5 * (х + 5);

5 * x + 5 * 5 = - 7;

5 * x + 25 = - 7;

5 * x = - 7 - 25;

5 * x = - 33;

x = - 33/5.

5) 9 = 5 * (х + 9);

5 * x + 5 * 9 = 9;

5 * x + 45 = 9;

5 * x = 9 - 45;

5 * x = - 36;

x = - 36/5.