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(1/4)^x-1=∛2^2x +1
(2^-2)^x-1 = 2 ^ 2x+1/3
jadi -2x+1 = 2x+1/3
3(-2x+1) = 2x+1
-6x+3= 2x+1
6-1 = 2x+6x
5= 8x
5/8 = x