x/20 = 21/14 (similar proportions)
x/20 = 3/2 (simplify by canceling out a factor of 7)
x = 30
72 is the length d of how deep end in feet}
:D i hav th same question cuz i hav lik 3 E's
probably one failing grade each quarter or marking period w.e ur school calls it
ik in my school i cn get honor role even tho i hav one C soooo ^thts wat im thinkin
Greetings!
Distribute the Parenthesis.

Combine like terms.

Add
-9 to both sides.


Divide both sides by
-3.
The Answer Is:
Hope this helps.
-Benjamin