How do you solve and write the following in interval notation: # 8 (x - 9) >7 (x - 9) + x#?

1 Answer
Sep 8, 2017

Answer:

#x in phi#
(there are no values of #x# for which this is true)

Explanation:

#{: (8(x-9),color(white)("XX")>color(white)("XX"),7(x-9)+x), (8x-72,color(white)("XX")>color(white)("XX"),8x-63), (-72,color(white)("XX")>color(white)("XX"),-63) :}#
There is no possibility that any value of #x# would make this true.