if f(x) = 7x-1 and g(x) = 4/(x-2), solve fg(x) = x
fg(x) = 7(4/x-2) -1 = x
28/(x-2) - 1 = x
28/(x-2) = x +1
28 = (x+1)(x-2)
28 = x2 - x - 2
0 = x2 - x - 30
0 = (x-6)(x+5) x=6 x=-5
SW
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