if 625^x=25/5^x,find x
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625^x=5^2/5^x
5^4x=5^2-x
4x=2-x
4x plus x=2
5x=2
x=2/5
5^4x=5^2-x
4x=2-x
4x plus x=2
5x=2
x=2/5
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