Question

Numerele x si y sunt direct proportionale cu numerele 3si 4 . dDEtterminati cele doua numere stiind ca y este egal cu 14 mai mare decat x

Answer 1

y=x+14
y-x=14

{x,y}dp{3,4}
x/3=y/4=k
x/3=k
x=3k
y/4=k
y=4k
4k-3k=14
k=14
x=3k=3·14=42
y=4k=4·14=56
verificare
y=x+14
y=42+14
y=56

Answer 2

x/3 =y/4  ;    =>  4x =3y
y =x+14

4x =3(x+14)
4x =3x+42
ax-3x =42
x =42

y =x+14
y =42+14 =56
v  ;   42/3 =56/4
            14 =14