Final answer:
To translate the sentence into an equation, we use the variable b to represent the unknown number. The equation becomes 3b + 6 = 9.
Step-by-step explanation:
To translate the sentence into an equation, we can use the variable b to represent the unknown number. The sum of 3 times a number and 6 is equal to 9. So, the equation would be expressed as 3b + 6 = 9.
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