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frez [133]
3 years ago
7

1: i am thinking of a number. When it is increased by 7, it equals 21. what is my number

Mathematics
1 answer:
bazaltina [42]3 years ago
3 0

Answer:

N = 14

Step-by-step explanation:

Let the number be N.  Then:

N + 7 = 21

Now solve this equation for N:

Subtract 7 from both sides.  We get:

N = 14

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