Question

$0.90x + $8 = (16 + x)($0.65)

Answer 1

$0.90x \ +8\ =(16+x)*0.65\ \\\\ 0.90x\ +8\ =10.4\ +0.65x\ \\\\ 0.90x\ -0.65x\ =10.4\ -8\ \\\\ 0.25x\ =2.4\ \\\\ \boxed{x=\frac{2.4\ }{0.25\ }=9.6}$