<PRE><B>Question 1161079</B>
Raina, Kevin, and Dan sent a total of 104 text messages during the weekend.
r + k + d = 104
 Dan sent 2 times as many messages as Raina.
d - 2r
 Kevin sent 8 more messages than Raina.
k = r + 8
Using the first equation, replace d with 2r; replace k with (r+8)
r + 2r + (r+8) = 104
4r = 104 - 8
r = 96/4
r = 24 msg by Raina
then
d = 2(24)
d = 48 msg by Dan
and
k = 24 + 8
k = 32 msg by Kevin
:
:
See if that checks out
24 + 48 + 32 = 104
</PRE>