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x in (-oo:+oo)
(-3/7)*(x-2) = -18 // + 18
(-3/7)*(x-2)+18 = 0
18-3/7*(x-2) = 0
18-3/7*(x-2) = 0
132/7-3/7*x = 0
132/7-3/7*x = 0
132/7-3/7*x = 0 // - 132/7
-3/7*x = -132/7 // : -3/7
x = -132/7/(-3/7)
x = 44
x = 44
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