ini gi mna ya? bantu ya..

1) 9^2x = 27^2x+1
(3²)^2x = ( 3³) ^2x+1
=> 2(2x) = 3(2x + 1)
=> 4x = 6x + 3
=> 4x - 6x = 3
=> - 2x = 3
=> x = - ⅔

2) 5^x-1 = 5^3x-11
=> x - 1 = 3x - 11
=> x - 3x = - 11 + 1
=> - 2x = - 10
=> x = 5