Answer:
30
Step-by-step explanation:
120/4
Y = k/x for some fixed number constant k
7 = k/9
k = 63
so Y = 63/x
14 = 63/x
14 x = 63
x = 63/14 = 9/2
It is a quadratic
where x-8 is the squared term
do
x-8=u
u^2-13u+30=0
solve
u=
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u=
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u=
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u=
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u=
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u=

or u=
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u=10 or 3
10=x-8 or 3=x-8
18=x or 11=x
x=11 and/or 18