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x in (-oo:+oo)
25/6 = (5/2)*(x+2) // - (5/2)*(x+2)
25/6-((5/2)*(x+2)) = 0
(-5/2)*(x+2)+25/6 = 0
25/6-5/2*(x+2) = 0
(-5/2*6*(x+2))/6+25/6 = 0
25-5/2*6*(x+2) = 0
-15*x-5 = 0
(-15*x-5)/6 = 0
(-15*x-5)/6 = 0 // * 6
-15*x-5 = 0
-15*x-5 = 0 // + 5
-15*x = 5 // : -15
x = 5/(-15)
x = -1/3
x = -1/3
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