gordonantonio13 gordonantonio13

25-01-2020
Mathematics

contestada

The sum of two numbers is 30 and their difference is 12 find the two numbers

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Yang100 Yang100

25-01-2020

Answer:

The two numbers are 21 and 9.

Step-by-step explanation:

x+y=30

x-y=12

-------------

2x=42

x=42/2

x=21

21+y=30

y=30-21=9

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