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(10/3)*x+(14/3)*y = 4*x // - 4*x
(10/3)*x-(4*x)+(14/3)*y = 0
(10/3)*x-4*x+(14/3)*y = 0
14/3*y-2/3*x = 0 // - 14/3*y
-2/3*x = -(14/3*y) // : -2/3
x = (-(14/3*y))/(-2/3)
x = 7*y
x = 7*y
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