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If 4x + 9 = 16, what is the value of 12x + 21 ? ​
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If 4x + 9 = 16, what is the value of 12x + 21 ? ​

User Frithjof Schaefer
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1 Answer

3 votes
answer: 42

x=7/4
4(7/4)+9=16
12(7/4)+21= 42
User Lucas Rodrigues
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