For every side you just add 90 to your equation. so #4 would be 360-125-125-55=(55)
The value do you mean absolute value if you do it would be 4
Let
x-------> the number of fiction books
y-------> the number of nonfiction books.
we know that
-----> equation 
-----> equation 
Add equation
and equation 
<u>find the value of y</u>



therefore
<u>the answer is</u>
Part a) the number of fiction books is 
Part b) the number of nonfiction books is 
0.48- Use a calculator if you need it. Use your multiples if needed. Hava a good day!