Michael A. answered 10/11/16
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This requires cross-multiplication.
Given a/b = c/d (where neither b or d are equal to 0), then we have:
a * d = b * c, or ad = bc
Our problem becomes:
(x - 2)(x - 4) = (x - 6)(x + 5)
x² - 4x - 2x + 8 = x² + 5x - 6x - 30 by FOIL
x² - 6x + 8 = x² - x - 30
-6x + 8 = -x - 30
-5x + 8 = -30
-5x = -38
x = 38/5