find all of the ordered triples (x, y,z) such that when any one of the numbers is added to the product of the other two, the result is 2

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?

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Nine more than four times a number is the same as one less than twice the number. find the number?