解方程 (2/3)^x *(9/8)^x=27/64
问题描述：
解方程 (2/3)^x *(9/8)^x=27/64
答
(2/3)^x *(9/8)^x=27/64
(2/3*9/8)^x=27/64
(3/4)^x=27/64
x=3