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(7/2)*x-(9/2) = 19/2 // - 19/2
(7/2)*x-(9/2)-(19/2) = 0
(7/2)*x-9/2-19/2 = 0
7/2*x-14 = 0 // + 14
7/2*x = 14 // : 7/2
x = 14/7/2
x = 4
x = 4
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