Question

найди корень уравнения​

Answer 1

Ответ:

1) x=±1,1

2) x=±84

3) $x_{1} = 28\frac{17}{30}\\x_{2} = -28\frac{17}{30}$

Объяснение:

1) + 20,9=22

|x| =22- 20,9

|x| =1,1

x=±1,1

2) |x| - 74,6=9,4

|x| = 9,4+74,6

|x| = 84

x=±84

3)

$|x|- 21,9 = 6\frac{2}{3} \\\\|x| = 6\frac{2}{3} + 21,9 \\6\frac{2}{3} + 21,9 = 6 + \frac{2}{3} + 21 + \frac{9}{10} = 27 + \frac{20}{30} = \frac{27}{30} = 27 + \frac{47}{30} = 27 + 1\frac{17}{30} = 28\frac{17}{30}\\|x| = 28\frac{17}{30} \\\\x_{1} = 28\frac{17}{30} \\ \\\\ x_{2} = -28\frac{17}{30}$