Question #64d1f
1 Answer
Sep 7, 2017
Explanation:
If Sachin's age is represented by
#s=r-4#
#s/r = 7/9#
From the second equation, we can cross-multiply to get
#7r = 9s#
#r = (9s)/7#
Now, substitute this into the first equation and solve for
#s = (9s)/7 -4#
#s = (9s)/7 - 28/7#
#s = (9s - 28)/7#
#7s = 9s - 28#
#-2s = -28#
#s = 14#
Sachin is