Question

(3^2x-1) + (3^2x) = 324

Answer 1

(9x-1)+(9*2x) = 324
9x-1+(18x) = 324
9x-1+18x = 324
27x-1 - 324
27x = 324+1
27x = 325
x = 325 в знаменатели 27 325/27