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kari74 [83]
4 years ago
14

Which expression is equivalent to 21x+9-3x

Mathematics
2 answers:
Wittaler [7]4 years ago
4 0
You can simplify this expression by combining like terms. You can see that you can subtract 3x from 21x leaving us with (your answer): 18x + 9. You could also factor this to look like 9(2x + 1). Whichever one you prefer :))
lorasvet [3.4K]4 years ago
3 0
18x+9 is the correct answer
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