Заранее вам х+5):(1/2)^-(6х+7)=1/16
2.(1/5)^(3х-6):(1/5)^(2х-2)=1
3.(1/4)^(х-9)=1/16
4.(1/5)^(5-х)=125
5.(1/8)^(-3+х)=512
6.(1/9)^(2+х)=729
7.81^(х-4)=1/3
8.3^(8-х)=27
9.(1/6)^(4х-6)=1/36
10.(1/8)^(1-х)=64
11.5^(х-7)=1/125
12.(1/2)^(6-2х)=4
13.20:(1/9)^(х-13)=3