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4x-5=3³
4x-5=27
4x=27+5
x=32/4
x=8
3log(4x-5)=3 menjadi 3^3=4x-5
dari persamaan eksponen tersebut kita bisa memperoleh nilai x
3^3=4x-5
27 = 4x-5
27 +5 = 4x
32= 4x
8 =x