Question

daca suma dintre x ,jumatatealui x si patrimea lui x este 28.aflati nr x

Answer 1

x+x/2+x/4=28
4x+2x+x=112
7x=112
x=112/7=16
Coroana?

Answer 2

x+$\frac{x}{2}$+$\frac{x}{4}$=28 ( aducem la acelasi numitor ) => $\frac{4x}{4}$+$\frac{2x}{4}$+$\frac{x}{4}$=28
    $\frac{4x+2x+x}{4}$=28 (inmultim cu patru) =>
7x=112 ; x= $\frac{112}{7}$ ; x=16