Question 973860
This requires a constant difference between successive terms.


{{{x-3-(2x-4)=8-x-(x-3)}}}


{{{-x+1=11-2x}}}


{{{x=-1+11}}}


{{{highlight_green(x=10)}}}


The first three terms are 16, 7, -2.


Common difference is 9, but this is SUBTRACTED to reach each n+1 term from any n term.