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(1/26)*(x-4) = 4*x-9 // - 4*x-9
(1/26)*(x-4)-(4*x)+9 = 0
(1/26)*(x-4)-4*x+9 = 0
1/26*(x-4)-4*x+9 = 0
1/26*(x-4)-4*x+9 = 0
9-103/26*x-2/13 = 0
115/13-103/26*x = 0
115/13-103/26*x = 0
115/13-103/26*x = 0 // - 115/13
-103/26*x = -115/13 // : -103/26
x = -115/13/(-103/26)
x = 230/103
x = 230/103
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