Question

solve (a+6d)-(a-3d)=15 so that after solving this comes 3d=15​

Answer 1

Answer:

This become that and as you get the common difference just add it in to one of the equations to get the first term of an.

Answer 2

Answer:

(a+6d)-(a-3d)=15

a+6d-a+3d=15 (removing brackets)

6d-3d = 15

3d = 15

d=15

Here's ur answer bro

Follow me and mark me as a brainliest