Question

Bobby has a sister named Abbey. Bobby’s sister Abbey is 4 years older than 1/3 of Bobby’s age. a) Write an expression for Abbey’s age in terms of Bobby’s age, b. b) How old is Bobby if Abbey is 7 years old?

Answer 1

Step-by-step explanation:

a=1/3b + 4

7=1/3b+4

3=1/3b

b=9