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68*y = (4*x-2)/30 // - (4*x-2)/30
68*y-((4*x-2)/30) = 0
(-1*(4*x-2))/30+68*y = 0
(-1*(4*x-2))/30+(30*68*y)/30 = 0
30*68*y-1*(4*x-2) = 0
2040*y-4*x+2 = 0
(2040*y-4*x+2)/30 = 0
(2040*y-4*x+2)/30 = 0 // * 30
2040*y-4*x+2 = 0
2040*y-4*x+2 = 0 // - 2040*y+2
-4*x = -(2040*y+2) // : -4
x = (-(2040*y+2))/(-4)
x = (2040*y+2)/4
x = (2040*y+2)/4
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