Question

$5^{4x+3}*2^{4x+3} leq 5^{3x}*2^{3x}$

Answer 1

$(5*2)^{4x+3} leq (5*2)^{3x}$
$10^{4x+3} leq 10^{3x}$
$4x+3-3x leq 0$
$x leq -3$