Решите уровнения 1) 500: (3y-7) + 95=120 2) 900 - (14x+8) : 20=894

1) 500 / (3y - 7) + 95 = 120;

500 / (3y - 7) * (1 / 5) + 95 * (1 / 5) = 120 * (1 / 5);

100 / (3y - 7) + 19 = 24;

100 / (3y - 7) = 24 - 19;

100 / (3y - 7) = 5;

100 / (3y - 7) * (1 / 5) = 5 * (1 / 5);

20 / (3y - 7) = 1;

20 / (3y - 7) * (3y - 7) = 1 * (3y - 7)

20 = 3 у - 7;

3 у = 20 + 7;

3 у = 27;

у = 9.

Ответ: 9.

2) 900 - (14x + 8) : 20 = 894;

- (14x + 8) : 20 = 894 - 900;

- (14x + 8) : 20 = - 6;

- (14x + 8) = - 6 * 20;

- (14x + 8) = - 120;

- (14x + 8) / ( - 2) = - 120 / ( - 2);

7 х + 4 = 60;

7 х = 60 - 4;

7 х = 56;

х = 8.

Ответ: 8.