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x in (-oo:+oo)
(4/7)*x-(3/2) = x-(35/28) // - x-(35/28)
(4/7)*x-x-(3/2)+35/28 = 0
(4/7)*x-x-3/2+35/28 = 0
-3/7*x-1/4 = 0 // + 1/4
-3/7*x = 1/4 // : -3/7
x = 1/4/(-3/7)
x = -7/12
x = -7/12
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