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x in (-oo:+oo)
(1/7)*x+1/2 = x+19/14 // - x+19/14
(1/7)*x-x+1/2-(19/14) = 0
(1/7)*x-x+1/2-19/14 = 0
-6/7*x-6/7 = 0 // + 6/7
-6/7*x = 6/7 // : -6/7
x = 6/7/(-6/7)
x = -1
x = -1
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