Решите уравнение: 1) 6х + 8х - 7х = 714; 3) 11x - 6х + 17 = 2042; 2) 23x - 19х + 5х = 1827; 4) 5х + 3х - 47 = 6401.

ответ:

1) 6x + 8x - 7x = 714;
7х = 714;
x = 714 : 7;
x = 102;

2) 23x - 19x + 5x = 1827;
9х = 1827;
х = 1827 : 9;
х = 203;

3) 11x - 6х + 17 = 2042;
5x = 2042 - 17:
5x = 2025;
х = 2025: 5:
х = 405;

4) 5х + 3x - 47 = 6401;
8x = 6401 + 47;
8х = 6448;
х = 6448 : 8;
х = 806.