In an ap, if the common difference (d) =-4, and the seventh term(a7) is 4, then find the first term.

In an ap, if the common difference (d) =-4, and the seventh term(a7) i

1.	In an ap, if the common difference (d) =-4, and the seventh term(a7) is 4, then find the first term.
Answer» 28