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