Question

Sabendo que X +Y = 42 , determine x e y na proporção \frac{x}{y} = \frac{5}{9}
Conta por favor?

Answer 1

$\frac{x}{y} = \frac{5}{9}$

x=5y/9
x+y=49

5y/9+y-49=0
$\frac{5y+9y-441}{9}=0$
5y+9y=441
14y=441
y=441/14=31,5
ou $\frac{63}{2}$
x=5.31,5/9
x=157,5/9
x=17,5
ou $\frac{35}{2}$

Resposta:
x=$\frac{35}{2}$ e y=$\frac{63}{2}$