Question

Aflati nr stiind ca :
A)2 supra 5 din el reprezinta 36
B) 7 supra 5 din el reprezinta 280

Answer 1

a).  2/5 * x = 36     ⇒   x = 36 : 2/5 = 36 * 5/2 = 18*5 = 90 ;

b).  7/5 * x = 280   ⇒  x = 280 : 7/5 =280 * 5/7=40 * 5=200 ;

Answer 2

$\frac{2}{5}$ · x =36⇒x=$\frac{36*5}{2}$ = 90


$\frac{7}{5}$ · x =280⇒x=$\frac{280*5}{7}$ = 200