Question

Dacax/y=3/4 calculati x/x+y si 3x-y/2x

Answer 1

$\frac{x}{y} = \frac{3}{4} \\ \frac{x}{3} = \frac{y}{4} = k \\ x = 3k \\ y = 4k \: \\ \frac{x}{x + y} = \frac{3k}{3k + 4k} = \frac{3k}{7k} \\ \frac{3x - y}{2x} = \frac{3 \times 3k - 4k}{2 \times 3k} = \frac{9k - 4k}{6k} = \frac{5k}{6k}$

Answer 2

x/y=3/4=>x=3y/4
x/(x+y)=3y/4/(3y/4+y)=3y/4/7y/4=3y/4*4/7y=3/7 (3x-y)/2x=(3*3y/4-y)/2*3y/4=5y/4/3y/2=5y/4=5/6