Olympiad Mathematics | Many Failed This | Can You Solve?

[@andrewtate8792]

With the process of just try and error you can come up with the answer a=1 in like 10 seconds.

[@learnmathswith_fortune]

True But to make it understandable

[@saucemaster6452]

it's not 1 as 4^2 + 4^0 = 17, not 20.