-5/6x-1/9x=-102. Help please

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Landon wrote that 3−2.6=4. which statement about his answer is true?

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.