The first term of the sequence is 12. You can also tell that you’re adding five after the first term. 12+5(x-1)=y Since you’re not automatically adding it on the first term, you need to subtract one from x. You could also do this. 7+5x=y You would still get the same number. Let’s plug 405 in for x in the equations. 12+5(405-1) 12+5(404) 12+2020 2032 Let’s see if it’s the same thing in the second equation. 7+5(405) 7+2025 2032 The 405th term is 2032.
