12в-7(в+4)=26-4в помогите решить

по каким признакам млекопитающее можно отличить от других животных?

Помогите)

Read the text and put the verbs in brackets in the correct form.

Example: He (to be) tired. - He is tired.

There (to be) many different hotels in our city and people usually (to choose) the hotel they (to like). It (to depend) on what they (to be) here for. Old people (not like) noisy places, so they (to stay) in old0fashioned and quiet hotels. If a person (to want) to relax after a busy week he (to prefer) a hotel within easy reach of the beach with casinos and restaurants. When people (to be) here on business, they, of course, (to book) rooms in the city centre in a hotel which (to be) fully equipped for that. My sister (to have) two children, so they usually (to stay) in a hotel with children's playground and baby-sitters. She (not like) large hotels. I (to help) her with her luggage.