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j in (-oo:+oo)
14-((1/5)*(j-10)) = (2/5)*(j+25) // - (2/5)*(j+25)
14-((1/5)*(j-10))-((2/5)*(j+25)) = 0
(-1/5)*(j-10)+(-2/5)*(j+25)+14 = 0
14-1/5*(j-10)-2/5*(j+25) = 0
14-1/5*(j-10)-2/5*(j+25) = 0
14-3/5*j-8 = 0
6-3/5*j = 0
6-3/5*j = 0
6-3/5*j = 0 // - 6
-3/5*j = -6 // : -3/5
j = -6/(-3/5)
j = 10
j = 10
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