Question

daca nr x si y sunt direct proportionalecu 2 si 5 aflati cat la suta reprezinta x din y

Answer 1

Răspuns:

x/2=y/5=K

x/2=K

x/5=K

x/2=y/5 => 5x=2y => x=2y/5

y....100%

2y/5.....x%

x=2y×100/100/5/y=0,4 =>y=40%