Решите уравнение: 1) 100: (18 + (82 - 10х): 6) = 5, 2) (105 - (25 + 6х) • 4) • 30 = 150.

ответ:

1) 100 : (18 + (82 - 10х) : 6) = 5;
18 + (82 - 10х) : 6 = 100 : 5;
18 + (82 - 10х) : 6 = 20;
(82 - 10х) : 6 = 20 - 18;
(82-10х) : 6 = 2;
82 - 10х = 2 • 6;
82 - 10х = 12;
10х = 82 - 12;
10х = 70;
х = 70 : 10;
Х = 7;

2) (105 - (25 + 6х) • 4) • 30 = 150;
105 - (25 + 6х) • 4 = 150 : 30;
105 - (25 + бх) • 4 = 5;
(25 + 6х) • 4 = 105 - 5;
(25 + 6х) • 4 = 100;
25 + 6х = 100 : 4;
25 + 6х = 25;
6х = 25 - 25;
6х = 0;
x = 0.