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x in (-oo:+oo)
(5*(6-(2*x)))/7 = 8 // - 8
(5*(6-(2*x)))/7-8 = 0
(5*(6-2*x))/7-8 = 0
(5*(6-2*x))/7+(-8*7)/7 = 0
5*(6-2*x)-8*7 = 0
-10*x-26 = 0
(-10*x-26)/7 = 0
(-10*x-26)/7 = 0 // * 7
-10*x-26 = 0
-10*x-26 = 0 // + 26
-10*x = 26 // : -10
x = 26/(-10)
x = -13/5
x = -13/5
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