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0 = x-((4/7)*y)-(8/7) // - x-((4/7)*y)-(8/7)
(4/7)*y-x+8/7+0 = 0
(4/7)*y-x+8/7 = 0
4/7*y-x+8/7 = 0 // - 4/7*y+8/7
-x = -(4/7*y+8/7) // * -1
x = 4/7*y+8/7
x = 4/7*y+8/7
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