Let the breadth be x
length=x+8
according to the question
area of the pool = l*b
105=x*x+8
if u solve this equation further u will get the answer
Observe that

In the original equation, divide both sides by
:


Next,

where
is any integer. Then

Fix
to ensure
, so that

I DONT UNDERSTAND YOUR LANGUAGE IM SORRY ILL TRY TO TRANSLATE
Answer:
She paid 9% of sales tax
Step-by-step explanation:
The sale price of diamond = $375
Let x be percent of sales tax
So, amount of tax = 
So, Amount including tax = 375+3.75x
We are given that Bethany paid $408.75 for a pair of diamond stud earrings.
So, 375+3.75x=408.75
3.75x=408.75-375

x=9
Hence She paid 9% of sales tax
Unlike terms displays terms which are not the same. x+2y would be the answer.