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twice the difference of a number and nine is greater than 20 use the variable b for the unknown number
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twice the difference of a number and nine is greater than 20 use the variable b for the unknown number

User Anton Harniakou
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2 votes

Answer:

Explanation:

2(b-9) > 20

b - 9 > 20/2

b - 9 > 10

b > 10+9

b > 19

User Thomaz Capra
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