Question

solution of this question​

Answer 1

Let the numbers be

x-2d,x-d,X,X+d,X+2d

So

x-2d+x-d+X+x+d+X+2d=12.5

5x=12.5

x=2.5

And

x-2d/X+2d=2/3

3x-6d=2x+4d

x=10d

d=0.25

So the numbers are

2,2.25,2.5,2.75,3(a)