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x in (-oo:+oo)
2*x = (4-(5*(8-(5*x))))/7 // - (4-(5*(8-(5*x))))/7
2*x-((4-(5*(8-(5*x))))/7) = 0
2*x-((4-5*(8-5*x))/7) = 0
(-1*(4-5*(8-5*x)))/7+2*x = 0
(-1*(4-5*(8-5*x)))/7+(2*7*x)/7 = 0
2*7*x-1*(4-5*(8-5*x)) = 0
36-11*x = 0
(36-11*x)/7 = 0
(36-11*x)/7 = 0 // * 7
36-11*x = 0
36-11*x = 0 // - 36
-11*x = -36 // : -11
x = -36/(-11)
x = 36/11
x = 36/11
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