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6*(500*x-(9/2))-2 = 6*(200-9)-2 // - 6*(200-9)-2
6*(500*x-(9/2))-(6*(200-9))-2+2 = 0
6*(500*x-9/2)-6*(200-9)-2+2 = 0
6*(500*x-9/2)-1146-2+2 = 0
6*(500*x-9/2)-1146-2+2 = 0
3000*x-1173-2+2 = 0
3000*x-1175+2 = 0
3000*x-1173 = 0
3000*x-1173 = 0
3000*x-1173 = 0 // + 1173
3000*x = 1173 // : 3000
x = 1173/3000
x = 391/1000
x = 391/1000
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