Answer:
3r − 9 = –6r
-9 = -6r-3r (you change the signs when bringing +3r to the other side)
-9 = -9r
r = -9/-9
r = 1
Answer:
the maximum number of crates that can be stacked between the floor and ceiling
where 1 foot = 12 inches. SO the answer is that a maximum of 10 crates can be stacked from floor to ceiling.
Step-by-step explanation:
i) the maximum number of crates that can be stacked between the floor and ceiling
where 1 foot = 12 inches
10 to the power of 6, I believe.

taking 2 to the other side ⇒

= 5 x 2
3x=10
taking 3 to the other side ⇒ x =

x = 3.34