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b) f(-3) = 8/(5+8) = 8/8 = 1
c) f(7) = 8/(5-7) = 8/-2 = -4
d) 2 = 8/(5-x)
10 - 2x = 8
2 = 2x
x = 1
e) 1/2 = 8/(5-x)
5 - x = 16
x = 5 - 16
x = -11