Tìm x, biết: a) 5/2x - 3/4 = -1/5
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Bài 3. Tìm x, biết:
a) \( \frac{5}{2} x - \frac{3}{4} = -\frac{1}{5} \)
b) \( \frac{4}{5} \left( -\frac{1}{2} x - \frac{3}{5} \right) = -\frac{2}{3} \)
c) \( \left( \frac{1}{2} - x \right) ^{3} + \frac{3}{4} = \frac{\sqrt{16}}{25} \)
d) \( \left( x - \frac{1}{3} \right)^{2} = \frac{16}{9} \)
e) \( (2x - 1)^{3} = -\frac{8}{27} \)
f) \( \frac{2}{5} x - \frac{1}{2} = \frac{3}{5} x + \frac{7}{10} \)
g) \( -\frac{9}{4} - 2x = -\frac{5}{6} x + \frac{7}{2} \)
h) \( \left( -\frac{1}{3} \right)^{2x^{-1}} = -\frac{1}{27} \)
i) \( \left( \frac{2}{3} \right)^{4x} = \left( \frac{8}{27} \right)^{8} \)
Bài 3. Tìm x, biết:
a) \( \frac{5}{2} x - \frac{3}{4} = -\frac{1}{5} \)
b) \( \frac{4}{5} \left( -\frac{1}{2} x - \frac{3}{5} \right) = -\frac{2}{3} \)
c) \( \left( \frac{1}{2} - x \right) ^{3} + \frac{3}{4} = \frac{\sqrt{16}}{25} \)
d) \( \left( x - \frac{1}{3} \right)^{2} = \frac{16}{9} \)
e) \( (2x - 1)^{3} = -\frac{8}{27} \)
f) \( \frac{2}{5} x - \frac{1}{2} = \frac{3}{5} x + \frac{7}{10} \)
g) \( -\frac{9}{4} - 2x = -\frac{5}{6} x + \frac{7}{2} \)
h) \( \left( -\frac{1}{3} \right)^{2x^{-1}} = -\frac{1}{27} \)
i) \( \left( \frac{2}{3} \right)^{4x} = \left( \frac{8}{27} \right)^{8} \)