Answer:
jfdslkhfbdjskbvdslkjfbv;kjdabva;ksjdvbljfslfdhglkdufhgdsrlkgujdsgljkdsfbvlkfdjdd;hgs;dihg;dsifvsj
Step-by-step explanation:
Answer:
top one yes, bottom one no
Step-by-step explanation:
To solve this problem you must apply the proccedure shown below:
You must switch the variables, and then, you must solve for
, as following:

Therefore, as you can see, the answer is: 
Don't forget about PEMDAS!
310-(20÷2×5)+15
310-50+15
275