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x in (-oo:+oo)
6/7-((1/5)*x) = 37/35 // - 37/35
6/7-((1/5)*x)-(37/35) = 0
(-1/5)*x+6/7-37/35 = 0
-1/5*x-1/5 = 0 // + 1/5
-1/5*x = 1/5 // : -1/5
x = 1/5/(-1/5)
x = -1
x = -1
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