Question

La intrebarea cati elevi are, Pitagora a raspuns : jumatate din ei studiaza matematica, o patrimestudiaza natura, o septime mediteaza in tacere, iar restulsunt 3 fecioare . Cati elevi are Pitagora ?

Answer 1

x/2⇒matematica;
x/4⇒natura;
x/7⇒tacere;
⇒x-x/2=2x/2-x/2=x/2;
⇒x/2-x/4=2x/4-x/4=x/4;
⇒x/4-x/7=7x/28-4x/28=3x/28;
⇒3x/28=3
⇒x=28·1⇒x=28;
⇒Pitagora are 28 de elevi;