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1. px - qy = 1
py + qx = 0

Express p in terms of x and y. Then do the same for q.

Could anyone show me how this is done? I know the answer but I can't work out how they have done it. It is really annoying me! lol

Thanks
2. (Original post by Magu1re)
px - qy = 1
py + qx = 0

Express p in terms of x and y. Then do the same for q.

Could anyone show me how this is done? I know the answer but I can't work out how they have done it. It is really annoying me! lol

Thanks
Multiply the top equation by p and the bottom by q and add
3. (Original post by rbnphlp)
Multiply the top equation by p and the bottom by q and add
Thanks dude. It's multiply top equation by x and then bottom by y. That way I get an equation which has only p in it. And then substitute it back in to the other.

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