Problem:
Find all real solutions to $5^{\frac{21 x}{2}+\frac{15}{2}}5^{-\frac{31 x}{2}-12} = 25^{-\frac{5 x}{2}-20}$
Answer:
$\{\}$
{'source': 'AMPS', 'file': 'amps/mathematica/algebra/exponential_equations/27007.txt'}