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19*y = x*((4*y)/6) // - x*((4*y)/6)
19*y-(x*((4*y)/6)) = 0
19*y+(-2/3)*x*y = 0
19*y-2/3*x*y = 0 // - 19*y
-2/3*x*y = -(19*y) // : -2/3*y
x = (-(19*y))/(-2/3*y)
x = 57/2
x = 57/2
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