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x = 3*(8/24)
x = 24/24
x = 1
x/4 = 9/16
x = 4*(9/16)
x = 36/16
x = 9/4
y/4 = 9/9
y = 4*1
y = 4
1 + x/4 = 5/x
(4 + x)/4 = 5/x
x(4 + x) = 4*5
x^2 + 4x = 20
x^2 + 4x - 20 = 0
x1= 2,9 ; x2 = -6,9