Question

5^3x-1 = 7^3x-1 .then find the value of x

Answer 1

25x-1=21x-1
25x-21x=-1+1
4x=0
x=0
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Answer 2

125(x-1) = 343(x-1)
125x-125 = 343x-343
-125+343 = 343x-125x
218 = 218x
X= 1

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