Answer: 
Step-by-step explanation:
Given
Function is 



from (i) and (ii) we get

Answer:
8 Books
Step-by-step explanation:
First find how many she had before buying 8 more-
12 - 8 = 4
Then multiply that by 2
4 x 2 = 8
The had 8 books to begin with
200-50=150
150/6=25
Sally will have to sell 25 pies to reach her goal.
<span><span> STEP 1. </span><span><span>x/5+6= 36
STEP 2. x/5 = 30
STEP TRES x= 150</span> </span></span>