Answers

2014-05-10T07:07:48+05:30
X+y = 20  
x-y = 30 
add the 2 equations
2x = 50
then, x = 25
25 + y = 20
y = 20 - 25
then, y = -5
so, x= 25 and y = -5
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2014-05-10T08:10:06+05:30
On solving the the two lineare  equations
we get x=25
and    y=-5.
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