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2*x-((2*x)/2)-19 = 2*x-(11/2) // - 2*x-(11/2)
2*x-((2*x)/2)-(2*x)+11/2-19 = 0
2*x-x-2*x+11/2-19 = 0
-x-27/2 = 0 // + 27/2
-x = 27/2 // * -1
x = -27/2
x = -27/2
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