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5*(19-(x/2)) = 35 // - 35
5*(19-(x/2))-35 = 0
5*(19-1/2*x)-35 = 0
5*(19-1/2*x)-35 = 0
60-5/2*x = 0
60-5/2*x = 0
60-5/2*x = 0 // - 60
-5/2*x = -60 // : -5/2
x = -60/(-5/2)
x = 24
x = 24
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