1)\(\dfrac{2^{18}}{32^3}.\dfrac{27^4}{54^3}\) | 4)\((\dfrac{1}{2})^x=\dfrac{1}{32}\) |
2)\(\dfrac{40^4}{120^4}.\dfrac{130^3}{390^3}\) | 5)\(\dfrac{x+1}{9}=\dfrac{4}{x+1}\) |
3)\(2^x=8\) | 6)\(\dfrac{2x}{5}=\dfrac{10}{x}\) |
7)\(19.5^{2x+7}=475\) | |
8)\(33^x:11^x=243\) | |
9)Tìm x, y biết: 5x=4y và y-x=7 |