Lat
a = 2^(x-2)
b = 5^(y-2)
Then you have
4a-25b = 3
a+b = 2
Hmmm. I suspect a typo, since the results are strange.
Solve the simultaneous equations
2^x-5^y=3
and
2^(x-2)+5^(y-2)=2
1 answer
2^x-5^y=3
and
2^(x-2)+5^(y-2)=2
1 answer