3a-10=21

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Solution for 3a-10=21 equation: 



3a-10=21

We move all terms to the left:

3a-10-(21)=0

We add all the numbers together, and all the variables

3a-31=0

We move all terms containing a to the left, all other terms to the right

3a=31

a=31/3

a=10+1/3

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