Question

Daca x supra y = 2 supra 3 calculati, 7x supra 7x+y?

Answer 1

x/y=2/3
⇒2y=3x
⇒x=2y/3;
⇒7x/7x+y
⇒7·2y/3/7·2y/3+y
⇒14y/3/14y/3+y
⇒14y/3/14y/3+3y/3
⇒14y/3/17y/3
⇒14y/3·3/17y
⇒14y/17y=14/17;

Answer 2

pai, daca sunt doua necunoscute, atunci x ii corespunde 2 si lui y 3
deci, rezulta 7x2 supra 7x2+y, care este egal cu 14 supra 17