Question

FAN N MEDAL
Mary is 14 years younger than her sister Jane. In four years, Jane will be 3 times older than Mary. How old is Jane now?

3

7

17

21

Answer 1

j-14=m
j+4=3(m+4)

first equation reworked to j=14+m by adding 14 to both sides. plug that in for j in the second equation and you get 14+m+4=3(m+4). Simplify that and you get 18+m=3m+12. Simplified again is 2m=6 and ultimately m=3

Mary is 3, Jane is 17 (14 years older)

Answer 2

You are correct :) thanks kind sir