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gogolik [260]
3 years ago
14

B - 9 = 21 linear equations

Mathematics
2 answers:
elena55 [62]3 years ago
5 0

add 9 from 9 this will cancel out the nine then add 9 to 21 and what ever u get is ur answer b=30

Step-by-step explanation:

b-9=21

  +9

lana66690 [7]3 years ago
3 0

Answer: b=30

Step-by-step explanation: add 9 to both sides

b−9+9=21+9

b=30

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