Question 500108
J = Jon's age
R = Ron's age
C = Cal's age
.
J = R because they are twins.
.
R = C+12
or
C = R-12
.
J = 3C
so
R = 3C
.
R = C+12
3C = C+12
2C = 12
C = 6
.
J = 3C
J = 3(6)
J = 18
.
J=R
R=18
.
Always check your work.
In this case, is Ron 12 years older than Cal?
Yes.
.
Answer:
Jon is 18.
Ron is 18.
Cal is 6.