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x in (-oo:+oo)
-5*x-(1/2) = 49/2 // - 49/2
-5*x-(1/2)-(49/2) = 0
-5*x-1/2-49/2 = 0
-5*x-25 = 0 // + 25
-5*x = 25 // : -5
x = 25/(-5)
x = -5
x = -5
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