Решите уравнение: 1) (25 + 35х): 15 = 4; 2) зх + 2х + 145 = 282: 3 + 53 • 2.

ответ:

1) (25 + 35x) : 15 = 4;
25 + 35х = 4 • 15;
25 + 35х = 60;
35x = 60 - 25:
35х = 35;
x = 35 : 35;
x = 1;

2)3х + 2x + 145 = 282 : 3 + 53 • 2;
5x + 145 = 94 + 106:
5х + 145 = 200;
5х = 200 - 145;
5х = 55;
x = 55 : 5;
x = 11.