You can put this solution on YOUR website! 15r - 15
0
...
10c + 5c + 6d + d
15c + 7d
... n + n n
...
...
35a + 5n + 2n(n-1)
35a + 5n + 2n(n) + 2n(-1)
.....................
Delighted to help.
-Reading Boosters
Email: HomeworkHelpers@ReadingBoosters.com
Wanting for others what we want for ourselves.