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| Math Central | Quandaries & Queries |
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Question from Tee, a student: 2x -y =5 and also I have to find the addition method to both problems |
Hi Tee,
If the first problem is to solve for x and y when
2x - y =5
2x + y =5
then you can add the two equations to obtain
4x = 10
and solve for x. In fact is is easier than that. if 2x - y is 5 and 2x + y is also 5 then y must be zero.
I don't understand the second problem. What are the instructions?
Penny
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