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x in (-oo:+oo)
6*x+8 = 25/2 // - 25/2
6*x-(25/2)+8 = 0
6*x-25/2+8 = 0
6*x-9/2 = 0 // + 9/2
6*x = 9/2 // : 6
x = 9/2/6
x = 3/4
x = 3/4
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