Posted by **Watermelon** on Saturday, December 3, 2011 at 10:23pm.

The consecutive terms of an arithmetic progression are 5-x, 8, 2x. Find the common difference of the progression.

- AP calculus -
**MathMate**, Saturday, December 3, 2011 at 10:53pm
The common difference of an A.P. is constant, therefore, we can take the difference of consecutive terms and equate the values to determine x:

2x-8 = 8 - (5-x) =>

2x - x = 8-5+8 =>

x = 11

or

common difference

=2x-8

= 14

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