'y=x+13, xy=30' ????

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05-04-2016
Mathematics

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'y=x+13, xy=30' ????

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tescoman1 tescoman1 · Answer 1 · 2016-04-06T07:41:52-04:00

tescoman1 tescoman1

06-04-2016

this is a simultaneous equation. its saying there are two numbers (x and y) that satisfy both equations. Rearrange the 2nd equation to get x=30/y and substitute this into the first equation to get y=(30/y) +13. solve this for y and then you can solve for x.

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