Can you please solve.
x 1 2 3 4
a 18 16 14 12
a=????
Thanks Brad
something like x + 8 -6!!!!!!!!!!
-------------------------------
The successive values of "a" differ by -2
But the successive values of "x" differ by only 1
However the successive values of "2x" will differ by 2
So let's put in a list between them for 2x
x 1 2 3 4
2x 2 4 6 8
a 18 16 14 12
Now we can observe that 2+18=20, 4+16=20, 6+14=20, 8+12=20
So it must be that 2x + a must equal 20, or
2x + a = 20, or solving for a
a = 20 - 2x.
So the answer is 20 - 2x
Edwin
