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x in (-oo:+oo)
0 = 2*x-(7/87) // - 2*x-(7/87)
7/87-(2*x)+0 = 0
7/87-2*x = 0
7/87-2*x = 0 // - 7/87
-2*x = -7/87 // : -2
x = -7/87/(-2)
x = 7/174
x = 7/174
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