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x in (-oo:+oo)
-2 = (1/5)*(x-3) // - (1/5)*(x-3)
-((1/5)*(x-3))-2 = 0
(-1/5)*(x-3)-2 = 0
-1/5*(x-3)-2 = 0
-1/5*(x-3)-2 = 0
-1/5*x-7/5 = 0
-1/5*x-7/5 = 0
-1/5*x-7/5 = 0 // + 7/5
-1/5*x = 7/5 // : -1/5
x = 7/5/(-1/5)
x = -7
x = -7
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