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x in (-oo:+oo)
-2*x-(7/2) = 13/2 // - 13/2
-2*x-(7/2)-(13/2) = 0
-2*x-7/2-13/2 = 0
-2*x-10 = 0 // + 10
-2*x = 10 // : -2
x = 10/(-2)
x = -5
x = -5
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