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4 years ago

9

Mary is 21 years old. Her age is 9 years more than 3 times Henry’s age. Which equation can be used to determine x, Henry’s age i

n years?

1 answer:

nika2105 [10]4 years ago

4 0

Answer:4

Step-by-step explanation:

21=3x+9

12=3x

X=4

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