You shouldn't have subtracted 7. When you assigned variables, P was P's age in1988. P+7 is P's age in1995. P = 41.

Q = 3(41) = 123. (123 years old!?!?)Q=3(34)=102 years old . Hence , R=102-25 =77years old .

R = 123 - 25 = 98

R = 98 - 5 = 93 years old.In 1988 , S was 5 years old .

SO when S was born , R=77-5=72 years old .

01