math
posted by Samantha .
Mike's number is 2000 more than Jerry's which is 400 less than Barry's. Larry's number is 1500 more than Sam's, which is 443. Sam's number is 60 less than Barry's.
WHat is each boy's number?

Set up:
M=J+2000
J=B400.
L=S+1500
S=443
S=B60
From the chain of equations, it would be possible to substitute backwards from the known values.
Given:
S=443
and
S=B60, so B=S+60=?
L=S+1500=?
J=B400=?
M=J+2000=?