Answers

2015-11-05T07:07:31+05:30
Let the no`s be x and y 
Then x - y = 9 ---------- eq(1)   [given as a no exceeds the other by 9]
Also x + y = 81 eq(2)
Add eq (1) and (2)
x - y = 9
x + y = 81
2x     = 90
x = 90/2
∴x = 45
Substituting x in eq 2
x + y = 81
⇒45 + y = 81
⇒y = 81 - 45
∴ y = 36
∴The no`s are 45 and 36
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2015-11-05T17:27:55+05:30
X+x+9=81
=>2x+9=81
=>2x=81-9
=>2x=72
=>x=72/2
=>x=36
: no.=36 and another no.= 36+9=45
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