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5^x-1 = 5^ 2+1/2
bilangan pokoknya ud sama sehingga
x-1 = 2+1/2
x=5/2+1
x=5/2+2/2=7/2
3. 2^2(2x-1) = 2^2x+3 #(³√8 = 2)
bilangan pokok ud sama sehingga
2(2x-1) = 2x+3
4x-2 = 2x +3
2x = 5
x = 5/2