If $x:y = 3:4$, then the value of $(5x - 2y) / (7x + 2y)$ is:

x=3 और y=4 रखें। परिणाम = (5*3 - 2*4) / (7*3 + 2*4) = (15 - 8) / (21 + 8) = 7/29।