Question

find the valve of X so that
$( \frac{5}{ 3} ) {}^{ - 5} {( \frac{5}{3} })^{ - 11 = ( \frac{5}{3}) } {}^{8x}$
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Answer 1

if the bases are same , powers can be equated

-5 -11 = 8x
-16/8= x
x= -2