Use a variable for the unknown number so it would be 77-2x also if you don't know a number and a variable together means to multiply them
Answer:
Um i cant see the picture
Step-by-step explanation:
I believe it is 30
Explained
To get 20/10 as a mixed number you would have to take 20 and divide it by 10. Once you do that your answer should be 2.
You have 2 denominators so they need to be in the same family 5 and 10 are in the same family you take the biggest denominator and that is your common denominator and 3 + 1 =4 so 4/10 is your answer. (unless you need to simplify)
