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x in (-oo:+oo)
(1/5)*(x-4) = 4*x-(3*(x-1))+13/5 // - 4*x-(3*(x-1))+13/5
(1/5)*(x-4)+3*(x-1)-(4*x)-(13/5) = 0
(1/5)*(x-4)+3*(x-1)-4*x-13/5 = 0
1/5*(x-4)+3*(x-1)-4*x-13/5 = 0
(1/5*5*(x-4))/5+(3*5*(x-1))/5+(-4*5*x)/5-13/5 = 0
1/5*5*(x-4)+3*5*(x-1)-4*5*x-13 = 0
16*x-20*x-19-13 = 0
-4*x-19-13 = 0
-4*x-32 = 0
(-4*x-32)/5 = 0
(-4*x-32)/5 = 0 // * 5
-4*x-32 = 0
-4*x-32 = 0 // + 32
-4*x = 32 // : -4
x = 32/(-4)
x = -8
x = -8
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