Решите уравнение 1) 2 (11х-5)-17х=55 2)5 (8х+3)-12=83 3)7 (2х+9)+3х=114 4)3 (4х+13)-25=74

1) 2 (11х - 5) - 17х = 55;

2 * 11x + 2 * (- 5) - 17x = 55;

22x - 10 - 17x = 55;

5x - 10 = 55;

5x = 55 + 10;

5x = 65;

x = 65 : 5;

x = 13.

Ответ. 13.

2) 5 (8х + 3) - 12 = 83;

5 * 8x + 5 * 3 - 12 = 83;

40x + 15 - 12 = 83;

40x + 3 = 83;

40x = 83 - 3;

40x = 80;

x = 80 : 40;

x = 2.

Ответ. 2.

3) 7 (2х + 9) + 3х = 114;

7 * 2x + 7 * 9 + 3x = 114;

14x + 63 + 3x = 114;

17x + 63 = 114;

17x = 114 - 63;

17x = 51;

x = 51 : 17;

x = 3.

Ответ. 3.

4) 3 (4х + 13) - 25 = 74;

3 * 4x + 3 * 13 - 25 = 74;

12x + 39 - 25 = 74;

12x + 14 = 74;

12x = 74 - 14;

12x = 60;

x = 60 : 12;

x = 5.

Ответ. 5.