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iris [78.8K]
3 years ago
12

To solve 2x + 9 = 21, what is the first step?

Mathematics
2 answers:
UNO [17]3 years ago
7 0

Answer:

2x + 9 = 21

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

1. subtract 9 from both sides

2x = 12

2. divide 12 by 2

x = 6

erastovalidia [21]3 years ago
4 0

Answer:

x = 6

Step-by-step explanation:

2x+9=21

Step one: 2x=21

-9

2x=12

Step two: x= 12÷2

x= 6

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