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x in (-oo:+oo)
(5-(2*x))/7 = 2 // - 2
(5-(2*x))/7-2 = 0
(5-2*x)/7-2 = 0
(5-2*x)/7+(-2*7)/7 = 0
5-2*x-2*7 = 0
-2*x-9 = 0
(-2*x-9)/7 = 0
(-2*x-9)/7 = 0 // * 7
-2*x-9 = 0
-2*x-9 = 0 // + 9
-2*x = 9 // : -2
x = 9/(-2)
x = -9/2
x = -9/2
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