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x in (-oo:+oo)
(8-(4*x))/3-(2*(5*x+8)) = (8*x+12)/9+2*(10*x+1) // - (8*x+12)/9+2*(10*x+1)
(8-(4*x))/3-(2*(5*x+8))-((8*x+12)/9)-(2*(10*x+1)) = 0
(8-4*x)/3-2*(5*x+8)-((8*x+12)/9)-2*(10*x+1) = 0
(8-4*x)/3-2*(5*x+8)+(-1*(8*x+12))/9-2*(10*x+1) = 0
(9*(8-4*x))/(3*9)+(-2*3*9*(5*x+8))/(3*9)+(-1*3*(8*x+12))/(3*9)+(-2*3*9*(10*x+1))/(3*9) = 0
9*(8-4*x)-2*3*9*(5*x+8)-1*3*(8*x+12)-2*3*9*(10*x+1) = 0
-306*x-24*x-540*x-360-54-36 = 0
-330*x-540*x-396-54 = 0
-870*x-450 = 0
(-870*x-450)/(3*9) = 0
(-870*x-450)/(3*9) = 0 // * 3*9
-870*x-450 = 0
-870*x-450 = 0 // + 450
-870*x = 450 // : -870
x = 450/(-870)
x = -15/29
x = -15/29
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