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Airida [17]
2 years ago
10

What is the value of x when x + 7 = 21?

Mathematics
2 answers:
sergij07 [2.7K]2 years ago
6 0

Answer:14

Step-by-step explanation:

x + 7 = 21

group like terms

x = 21 - 7

When positive cross = sign it turns negative

x = 14

Yuki888 [10]2 years ago
4 0
X + 7 = 21

- 7 - 7

x = 14
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