Together, Andrea and Brain weigh P pounds; Brain weights 10 pounds more than Andrea. Brain and Andrea’s dog, Cubby, weighs p/4 pounds more than Andrea. In terms of P, what is Cubby’a weight in pounds?
答案 3p/4-5
从题目条件可知
A+B=P
A+10=B
B+C=A+p/4( Brain and Andrea’s dog, Chubby,weights p/4) pounds more than Andrea) 这个公式不对吗