Tìm x , biết: (3/2)^3.x = (3/2)^5

1) \[{\left( {\frac{3}{2}} \right)^3}.x = {\left( {\frac{3}{2}} \right)^5}\]

 \[x = {\left( {\frac{3}{2}} \right)^5}:{\left( {\frac{3}{2}} \right)^3}\]

 \[x = {\left( {\frac{3}{2}} \right)^2}\]

 \[x = \frac{9}{4}\]  

 2) \[\frac{1}{2} - x = \frac{3}{4}\]

 \(x = \frac{1}{2} - \frac{3}{4}\)

 \(x = \frac{2}{4} - \frac{3}{4}\)

 \(x = \frac{{ - 1}}{4}\)

 3) \[{\left( {x - 0,3} \right)^2} = 9\]

 \[{\left( {x - 0,3} \right)^2} = {3^2}\] hoặc \[{\left( {x - 0,3} \right)^2} = {( - 3)^2}\]

 \(x - 0,3 = 3\) hoặc \(x - 0,3 =  - 3\)

 \(x = 3,3\) hoặc  \[x =  - 2,7\]

 4)  \[\frac{{ - 27}}{8}:x = {\left( {\frac{3}{2}} \right)^3}\]

 \[\frac{{ - 27}}{8}:x = \frac{{27}}{8}\]

 \[x = \frac{{ - 27}}{8}:\frac{{27}}{8}\]

 \[x =  - 1\]