Answers

2016-04-07T21:49:28+05:30
D= (-6)

-4+d=x
-4+(-6)=x    {plus and minus =minus}
-4-6=-12   {minus and minus is plus but as the nos. are negative negative                      symbol will come before the integers}


she might have taken -4+6 instead of taking -4-6

1 5 1
hope dis hlps...................^-^
2016-04-07T21:51:40+05:30
-4+(-6)=x
-4-6=x
x=-12

In the second step, Reeta might have taken -4+6, so she got the answer as 2. But its wrong.
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