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x in (-oo:+oo)
(-2/3)*(x+1/5) = (-1/8)*(x+2/5) // - (-1/8)*(x+2/5)
(-2/3)*(x+1/5)-((-1/8)*(x+2/5)) = 0
(-2/3)*(x+1/5)+(1/8)*(x+2/5) = 0
1/8*(x+2/5)-2/3*(x+1/5) = 0
1/8*(x+2/5)-2/3*(x+1/5) = 0
-13/24*x-1/12 = 0
-13/24*x-1/12 = 0
-13/24*x-1/12 = 0 // + 1/12
-13/24*x = 1/12 // : -13/24
x = 1/12/(-13/24)
x = -2/13
x = -2/13
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