Jawapan

2015-06-14T18:53:10+08:00
X-3y=4 ➡1
2/x + 4/y=6➡2
From 1
    x=4+3y➡3
Sub 3 into 2
2/4+3y  +  4/y = 6
2y/4+3y  +  4 = 6y
2y+16+12y=24y+18y²
18y²24y-2y-12y-16=0
18y²+10y-16=0
y=0.70   y=1.26
x=6.10   x=7.78