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x in (-oo:+oo)
(1/5)*(x+1) = (5/8)*x-((1/4)*x)-4 // - (5/8)*x-((1/4)*x)-4
(1/5)*(x+1)-((5/8)*x)+(1/4)*x+4 = 0
(1/5)*(x+1)+(-5/8)*x+(1/4)*x+4 = 0
1/5*(x+1)+(-5*x)/8+x/4+4 = 0
(1/5*4*8*(x+1))/(4*8)+(-5*4*x)/(4*8)+(8*x)/(4*8)+(8*4^2)/(4*8) = 0
1/5*4*8*(x+1)-5*4*x+8*x+8*4^2 = 0
8*x-68/5*x+32/5+128 = 0
32/5-28/5*x+128 = 0
672/5-28/5*x = 0
(672/5-28/5*x)/(4*8) = 0
(672/5-28/5*x)/(4*8) = 0 // * 4*8
672/5-28/5*x = 0
672/5-28/5*x = 0 // - 672/5
-28/5*x = -672/5 // : -28/5
x = -672/5/(-28/5)
x = 24
x = 24
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