9-3a/4+20y if x=8 and y=2
9-3a/4+20y if x=8 and y=2.....I'm assuming that we have
(9-3a)/(4+20y) if x=8 and y=2.....if so, we have
[9-3(8)]/[4+20(2)] =
[-15 ] / [ 44] =
( -15 / 44)