Answer:
1/4
Step-by-step explanation:
When there's more than one letter, and you just have to solve for one variable, you can just solve it like you would any other equation. Treat the other variables like numbers and add, subtract, multiply, and divide them to both sides of the equation in order to isolate the variable you want to solve for.
Answer:

Step-by-step explanation:

Answer:
8
Step-by-step explanation:
put 4 in place for a
4=32
dive both sides by 4 and you will get 8
hope this helps
The answer is 80....they all have to add up to 180