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x in (-oo:+oo)
y = 17*(x+4)-((8*x)/7)-x // - 17*(x+4)-((8*x)/7)-x
(8*x)/7-(17*(x+4))+x+y = 0
(8*x)/7-17*(x+4)+x+y = 0
(-17*7*(x+4))/7+(8*x)/7+(7*x)/7+(7*y)/7 = 0
8*x-17*7*(x+4)+7*x+7*y = 0
7*x-111*x+7*y-476 = 0
7*y-104*x-476 = 0
(7*y-104*x-476)/7 = 0
(7*y-104*x-476)/7 = 0 // * 7
7*y-104*x-476 = 0
7*y-104*x-476 = 0 // - 7*y-476
-104*x = -(7*y-476) // : -104
x = (-(7*y-476))/(-104)
x = (476-(7*y))/(-104)
x = (476-(7*y))/(-104)
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