Question

216^6x+1/21 = 1/36
0,2^5x+2=5√5

Answer 1

216^(6x+1/21)=1/36
6^(18x+1/7)=6^(-2)
18x+1/7=-2
18x-=15/7
x=-5/42.

0,2^(5x+2)=5√5
5^(-5x-2)=5^(3/2)
-5x-2=3/2
5x=-7/2
x=-7/10=-0,7.