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3 years ago

13

Find two numbers, if sum is 3 and their difference is 21

1 answer:

Nitella [24]3 years ago

3 0

x+y =3

x-y =21

2x = 24

x = 24/2

x = 12

12+y = 3

y = 3-12

y = -9

numbers are -9 and 12

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