Question

x/y=3/4

calculati: y/x , x/x+y , x/y-x y/x+y 2x/x+y ,3x/3x-y , y/2x+5y

Answer 1

y/x=4/3

x=3y/4
x/(x+y)=3/(3+4)=3/7
x(y-x) = 3y/4 : (y - 3y/4) = 3y/4 • 4/y = 3
y/(x+y)=4/(3+4)=4/7
2x/(x+y) = 3y/2 : (3y/4 + y) = 3y/2 • 4/7y = 6/7
3x/(3x-y) = 9y/4 : (9y/4 - y) = 9y/4 • 4/5y = 9/5
y/(2x+5y) = y : (3y/2 + 5y) = y • 2/13y = 2/13