Question

For what value of x are 2x-1 and 7 and 3x three consecutive term of an ap

Answer 1

let
2x-1 be a1
7 be a2
3x be a3
then
a3 - a2 = a2 -a1
3x - 7 = 7 - 2x + 1

~!@#$%^&*?
x = 3