26-08-2015
Mathematics

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The sum of a number b and 3 is greater than 8 and less than 12

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26-08-2015

Sum = addition (+)
Greater than = >
Less than = <

Sum of b and 3 = b + 3

Is greater than 8 = b + 3 > 8
Is less than 12 = b + 3 < 12

8 < b + 3 < 12

8 < b + 3
5 < b

b + 3 < 12
b < 9

b is greater than 5 and less than 9.

5 < b < 9

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