Martha is five years older than her sister. Martha's father is three times Martha's age, whole her mother is eight times the age of her sister. If the total of the ages of each of these four family members is 72, how old is Martha?
Hello there i hope you are having a good day :) Your question : Martha is five years older than her sister. Martha's father is three times Martha's age, whole her mother is eight times the age of her sister. If the total of the ages of each of these four family members is 72, how old is Martha? Answer:
Firstly, you would do Martha which is x+5 Her father would be 3(x+5) and her mother 8x and Martha sister x years old. All together that would equal to a total of 72. Then you would do x+5+x+3(x+5)+8x=72 and x+5+x+3x+15+8x=72 this would equal too 13x+20=72 and 13x=72-20 13x=52
finally doing x=52÷13 x=4 Then x+5 = 4+5= 9 years old.
