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Question

If the sum and difference of two numbers is 35 and 7 respectively, find the product of the numbers?

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Solution

Let the two numbers are x and y

The sum of these two numbers is 35

x+y=35 .................. (1)

The sum of these two numbers is 7

xy=7 .................. (2)

Adding Equation (1) and (2), we get,

x+y+xy=35+7

2x=42

x=422=21

Substitute x=21 in equation (1)

21+y=35
y=3521
y=14

So the two numbers are 21 and 14.
Hence Product=294

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