194k views
4 votes
How does:

12 + pi - 9pi/8

Become

12 - pi/8

Thanks for your help.

User Aldasa
by
3.4k points

1 Answer

1 vote
9pi/8 = 8pi/8 + pi/8 = pi + pi/8

12 + pi - 9pi/8 = 12 + pi - pi - pi/8
User Miles Wilson
by
3.2k points