Question

Пожайлуста, помогите с 828

Answer 1

Номер 828

1)

$|2x - 5| = 0 \\ 2x - 5 = 0 \\ 2x = 5 \: \: \: | \div 2\\ x = 2.5$

2)

$|4x - 3| = 0 \\ 4x - 3 = 0 \\ 4x = 3 \: \: \: | \div 4\\ x = 0.75$

3)

$|2 - 3x| = 0 \\ 2 - 3x = 0 \\ - 3x = - 2 \: \: \: | \div ( - 3)\\ x = \frac{2}{3}$

4)

$|4 - 5x| = 0 \\ 4 - 5x = 0 \\ - 5x = - 4 \: \: \: | \div ( - 5)\\ x = 0.8$

5)

$|3x + 1| + 2 {}^{3} = 8 \\|3x + 1| + 8 = 8 \\|3x + 1| = 0\\ 3x + 1= 0 \\ 3x = - 1 \: \: \: | \div 3\\ x = - \frac{1}{3}$

6)

$|9x + 2| - 3 {}^{3} = ( - 3) {}^{3} \\|9x + 2| - 27 = - 27 \\|9x + 2| = 0\\ 9x + 2= 0 \\ 9x = - 2 \: \: \: | \div 9\\ x = - \frac{2}{9}$