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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
35/x+5 = 7/2 // - 7/2
35/x-(7/2)+5 = 0
35/x-7/2+5 = 0
35*x^-1 = -3/2 // : 35
x^-1 = -3/70
-1 < 0
1/(x^1) = -3/70 // * x^1
1 = -3/70*x^1 // : -3/70
-70/3 = x^1
x = -70/3
x = -70/3
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