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Brrunno [24]
2 years ago
15

Select the correct answer.

Mathematics
2 answers:
arlik [135]2 years ago
6 0

Option B is correct

Why

3x=21

3(7) =21

21=21

Step-by-step explanation:

kolbaska11 [484]2 years ago
5 0

Answer:

-3x=21 , -7

Step-by-step explanation:

-3x=21\\x=\frac{21}{-3} =-7

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