plz somebody help me out with this one
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on squaring both side
(2/5)^1-2x = 15625/64
on reciprocating right side
(2/5)^1-2x = (64/15625)^-1
(2/5)^1-2x = (2/5)^-6
Now compare powers
1-2x = -6
x = 7/2