Đáp án:
Giải thích các bước giải:
$(x-\dfrac{2}{9})^{3}:\dfrac{-128}{5}=\dfrac{-2}{125}:(x-\dfrac{2}{9})$
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$(\dfrac{9x-2}{9})^{4}=\dfrac{-2}{125}.\dfrac{-128}{5}$
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$⇔(\dfrac{9x-2}{9})^{4}=\dfrac{256}{625}$
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$⇒$$\left \{ {{\frac{9x-2}{9}=\frac{4}{5}} \atop {\frac{9x-2}{9}=\frac{-4}{5}}} \right.$ ⇒$\left \{ {{45x-10=36} \atop {45x-10=-36}} \right.$ ⇒$\left \{ {{45x=46} \atop {45x=-26}} \right.$ ⇒$\left \{ {{x=\frac{46}{45}} \atop {x=\frac{-26}{45}}} \right.$
