0
Anonymous
9 - 5n + 1 = 15
-5n = 15 - 10
n = -5/5
n = -1
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X2 - 16X + 15 = 0 (X - 1)(X - 15) = 0 So X -1 = 0 or X - 15 = 0 ie X = 1 or X = 15
(5, 1)
(2, 1)
x = 0
y=x+1 there for answer is 2