7a/2=21

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Solution for 7a/2=21 equation: 



7a/2=21

We move all terms to the left:

7a/2-(21)=0

We multiply all the terms by the denominator


7a-21*2=0

We add all the numbers together, and all the variables

7a-42=0

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

7a=42

a=42/7

a=6

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