473 would be it because you can simplify it into fraction then you can do it by 1 so the answer is 473 or 374
20x+ 5y = 15
Move 20x to the other side. Sign changes from +20x to -20x
20x-20x+5y=-20x+15
5y=-20x+15
Divide both sides by 5
5y/5=y ( Cross out 5 and 5, divide by 5, 1*1*y=y)
-20/5=-4x
15/5=3
y=-4x+3 or y=3-4x
Answer: y=-4x+3 or y=3-4x
Using sine formula we have
8/sin60 = x/sin30
hence x= 8/√3 = 4.62
