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Can any one solve this

Can any one solve this-example-1
User Spulec
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1 Answer

6 votes

Answer:

The solution is (3, -1)

Explanation:

Add the two equations together and you get ...

2d = 6

d = 3 . . . . . divide by 2

Substitute that value into either equation. For the first, that substitution looks like ...

3 + e = 2

e = -1 . . . . . subtract 3

The solution is (d, e) = (3, -1).

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Comment on the general solution

As you can see, the larger of the two solutions to this "sum and difference" problem is d=(2+4)/2, the average of the sum and difference. This is generically true for all "sum and difference" problems.

User Mathias Nohall
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8.6k points

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