Question

[tex] log _7(8x)-log _74=2log _73

Answer 1

$log_{7}8x- log_{7}4=2 log_{7}3$
$log_{7} \frac{8x}{4} = log_{7}3^2$
$log_{7} \frac{8x}{4} = log_{7}9$
$log_{7}2x = log_{7}9$
$2x=9$
$x=4,5$