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(2/5)*y-(8*x) = 3 // - 3
(2/5)*y-(8*x)-3 = 0
(2/5)*y-8*x-3 = 0
2/5*y-8*x-3 = 0 // - 2/5*y-3
-8*x = -(2/5*y-3) // : -8
x = (-(2/5*y-3))/(-8)
x = (3-(2/5*y))/(-8)
x = (3-(2/5*y))/(-8)
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