3*2^(x+1)+2*5^(x-2)=5^(x)+2^(x-2) <=>
3*2^(x+1) -2^(x-2)=5^(x)-2*5^(x-2) <=>
(3*2^3-1)*2^(x-2)=(5^2-2)*5^(x-2) <=>
(3*8-1)*2^(x-2)=(25-2)*5^(x-2) <=>
23*2^(x-2)=23*5^(x-2) <=>
2^(x-2)=5^(x-2) <=>
(5/2)^(x-2)=1 <=>
x-2=0 <=>
x=2
3*2^(x+1)+2*5^(x-2)=5^(x)+2^(x-2) <=>
3*2^(x+1) -2^(x-2)=5^(x)-2*5^(x-2) <=>
(3*2^3-1)*2^(x-2)=(5^2-2)*5^(x-2) <=>
(3*8-1)*2^(x-2)=(25-2)*5^(x-2) <=>
23*2^(x-2)=23*5^(x-2) <=>
2^(x-2)=5^(x-2) <=>
(5/2)^(x-2)=1 <=>
x-2=0 <=>
x=2