Question

x/y = 3/4 atunci calc :x/x+y ​

Answer 1

$\frac{x}{y} = \frac{3}{4} \implies \: x = \frac{3y}{4} \\ \\ \iff \: \frac{x}{x + y} = \frac{ \frac{3y}{4} }{ \frac{3y}{4} + y} = \frac{3y}{4} \times \frac{1}{ \frac{3y + 4y}{4} } \\ \\ = \frac{3y}{4y} \times \frac{4}{7y} = \bold{\frac{3}{7} }$