Answers

2014-11-25T17:52:36+05:30
A + b = 76
a -b = 38
...............   (Add )
2a = 38 
a = 19
apply a value in any of two eqautions 
19 + b  = 76 
b = 76 - 19
b =  57 
a / b = 19 / 57 
a / b = 1 / 3
1 5 1
2014-11-25T18:01:25+05:30
    a + b = 76
(-) a - b = 38
--------------------
    2a = 38
     a = 19
a- b= 38
19 - b = 38
- b = 19
b = 19
a/b = 19/ -19
     = -1
1 5 1