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6a+3a-4a=21 (please solve)
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6a+3a-4a=21 (please solve)

User Mike Dymond
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1 Answer

2 votes
remember, you can do anything to an equation as long as you do it to both sides

6a+3a-4a=21
add like terms
6+3=9, and 9-4=5
5a=21
divide both sides by 5

a=(21)/(5)
User Reor
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