Question

решить уравнение :4^x+2+5*4^x=336

Answer 1

$4^{x+2}+5*4^x=336$
$4^x*16+5*4^x=336$
$4^x(16+5)=336$
$4^x*21=336$
$4^x=16$
$4^x=4^2$
x=2