Answer:
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Step-by-step explanation:
<u>1</u><u> </u> x-y = 10
2
multiply by 2
2* (<u>1</u> x+y) =10
x+y=20
Factor
<em>good luck, hope this helps :)</em>
yes
yes it will
Well, we can divide 399 and 75 so it would be 5.32. Round that and it would be about 5 items per page
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