Tìm x, biết

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DANG 2. TÌM X.
Câu 2. Tìm x, biết
1.

$15 \div 8 - 1 \div 8 \left( x - 0,5 \right) = \frac{5}{4}$
2.

$\frac{3}{4} : \frac{1}{5} = -\frac{1}{4}$
3.

$-2x = \frac{2}{3} \left( \frac{3}{4} - 1 \div 8 \cdot x \right) = \left(-\frac{1}{2}\right)^3$
4.

$(3x + 2)(5 - x^2) = 0$
5.

$|x - 1| - \left| 2 - \frac{3}{4} \right| = 2$
6.

$|x - 2| - \frac{1}{5} = 1$
7.

$|x - 2| - |1 - 2x| = 0$
8.

$\frac{1}{12} - \frac{4}{21} = \frac{1}{2} (3x - 2)$
9.

$8 \div (x - 5) = \frac{3}{x + 1}$ (với

$x \neq 5; -1$ )
10.

$x - 1 = \frac{4}{5}$ (với

$x \neq 2$ ).
11.

$x - \frac{2}{9} = \left( \frac{8}{27} \right)^3$
12.

$2 \cdot 3^{-405} = 3^{-1}$
13.

$\left( \frac{3}{4} \right)^3 = \frac{2^8}{3^4}$
14.

$(5x + 1)^2 = \frac{36}{49}$
15.

$\left[ (-0,5) \right]^3 = \frac{1}{64}$