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x in (-oo:+oo)
7/5 = x/2 // - x/2
7/5-(x/2) = 0
7/5-1/2*x = 0 // - 7/5
-1/2*x = -7/5 // : -1/2
x = -7/5/(-1/2)
x = 14/5
x = 14/5
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