Question 917754
<pre>G = Grandpa's age now
N = Nasir's age now
G-2 = Grandpa's age 2 years ago
N-2 = Nasir's age 2 years ago
G+3 = Grandpa's age 3 years from now
N+3 = Nasir's age 3 years from now</pre>two years ago nasir's grandpa was 7 times as old as nasir<pre>G-2 = 7(N-2)
G-2 = 7N-14
  G = 7N-12</pre>Three years from now, Nasir's grandpa will be five times as old as him.<pre>G+3 = 5(N+3)
G+3 = 5N+15
  G = 5N+12

{{{system(G=7N-12,G=5N+12)}}}

7N-12 = 5N+12
   2N = 24
    N = 12

G = 7N-12 = 7(12)-12 = 84-12 = 72.

Edwin</pre>