If (3 – x) + (6) + (7 - 5x) is a geometric series, find two possible values for х b the common ratio C c the sum of the GP.
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We have 
.
We add 6 to both sides.
.
Now, to solve for
, we factor out and divide by a 9 to get
.
We add 6 to both sides.
Now, to solve for