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22-10-2018
Mathematics

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The sum of two numbers is 15. The difference of he same two numbers is 3. What are the two numbers?

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22-10-2018

x+y =15

x-y = 3

add the two equations

2x = 18

divide by 2

x = 9

x + y = 15

9 + y =15

subtract 9

y = 9

The two numbers are 6 and 9

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