Bài 1: Tìm x :
a, \(2\cdot3^x-405=3^{x-1}\) b, \(\frac{x+1}{65}+\frac{x+3}{63}=\frac{x+5}{61}+\frac{x+7}{59}\)
c, \(\left(\frac{1}{2}\right)^{3x-1}=\frac{1}{32}\) d, \(\left(\frac{1}{81}\right)^x\cdot27^{2x}=\left(-9\right)^4\)
e,\(|3x-5|=|\frac{1}{2}x+3|\) f, \(\left(\frac{3}{4}-x\right)^3=\frac{1}{64}\)