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21-05-2017
Mathematics

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The sum of two numbers is 54 and the difference is 18 . what are the numbers

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21-05-2017

x + y = 54
x - y = 18 Add the two equations together
---------------
2x = 72 Divide both sides by 2

x = 36
36 + y = 54 Subtract 36 from both sides
y = 18
the numbers are 36 & 18

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