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x in (-oo:+oo)
-((1/2)*x)-4 = -37/10 // + -37/10
-((1/2)*x)-(-37/10)-4 = 0
(-1/2)*x+37/10-4 = 0
-1/2*x-3/10 = 0 // + 3/10
-1/2*x = 3/10 // : -1/2
x = 3/10/(-1/2)
x = -3/5
x = -3/5
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