Which of the following steps indicates the distributive property when solving -3(x+2)=21

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Apatient is to take 60 mg of an antibiotic on day 1, take 45mg on days 2 and 3, take 30mg on days 4 and 5 and take 15 mg on days 6 and 7. how many total mg will the patient take?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.