Question

The sum of two numbers is 47.
Their difference is 17. What are
the two numbers?

Answer 1

The numbers are 15 and 32.

Explanation:

Let:

x = one of the numbers

y = another number

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x + y = 47

x - y = 17

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x - y = 17

x = 17 +y

--

x + y = 47

(17+y) + y = 47

17+ y + y = 47

17 + 2y = 47

2y = 47 - 17

2y = 30

y = 30/2

y = 15

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x = 17 +y

x = 17 + 15

x = 32

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The numbers are 15 and 32.