Найдем х.
1) 5 * x - 7 = 58;
5 * x = 58 + 7;
5 * x = 65;
x = 65/5;
x = 15.
2) 3 * x + 5 * x + 4 = 76;
8 * x + 4 = 76;
8 * x = 76 - 4;
8 * x = 72;
x = 72/8;
x = 9.
Найдем х.
1) 5 * x - 7 = 58;
5 * x = 58 + 7;
5 * x = 65;
x = 65/5;
x = 15.
2) 3 * x + 5 * x + 4 = 76;
8 * x + 4 = 76;
8 * x = 76 - 4;
8 * x = 72;
x = 72/8;
x = 9.