Question

Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim now?

Answer 1

j = coach johnson's age
t = tim's age

Coach Johnson is 10 years older than Tim
j = t + 10

When Tim started football 3 years ago, Coach Johnson was twice his age
t - 3 = (j - 3)/2

And then you have simultaneous equations.

j = t + 10
t - 3 = (j - 3)/2

Good luck.

Answer 2

idk why but i cant solve it.

Answer 3

Okay, how about use substitution.
You know from that first equation what j is; j = t + 10
replace j with (t + 10) in the second equation.

so instead of
t - 3 = (j - 3)/2
you have
t - 3 = ((t + 10) - 3)/2

Now solve for t and you can find out what t is.

Answer 4

13 is the answer

Answer 5

Coach is 13 years old

Answer 6

????????? i get that this a very old question but i have a question for @Coyzita . how is the coach 13 years old ??????