Answers

2014-11-01T20:02:37+08:00
Let 'x' be the number
     'y' be the other number
x + y = 25  ----equation 1
y = x + 9  -----equation 2
substitute equation 2 to equation 1
x + x + 9 = 25
2x + 9 = 25
2x = 25 - 9
2x = 16
x = 8
substitute x=8 to equation 2
y = x + 9
y = 8 + 9
y = 17
0
one of the number exceed the other by 9 means.????
it only means that the other number say 'y' is greater than the other say 'x' by 9