How to solve the system of equations x (4 / 5 y) = 360 y (x + 3) = 480? x（4/5 y）=360 y（x+3）=480 How to solve this system of equations?

x（4/5 y）=360
4/5xy=60
xy=450
y（x+3）=480
xy+3y=480
450+3y=480
3y=30
y=10
x=450/y=45
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