Question

Daca 6/x = y/5, atunci determinati valoarea expresiei 128-3xy

Answer 1

$\frac{6}{x} = \frac{y}{5}$⇒$x*y=6*5$⇒$xy=30$⇒
$3xy=3*30$⇒$3xy=90$
Asadar:
$128-3xy=128-90=38$⇒$128-3xy=38$