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3^(2x + 1)/2 = 3^(2x - 4)
2x + 1 = 4x - 8
2x = 9
x = 9/2
3^2x+1 = 9^2x-4
3^2x+1 = (3^3)2x-4
3^2x+1 = 3^6x-12
2x+1 = 6x-12
1+12 = -2x+6x
13 = 4x
13/4 = x