3a/5=21

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Solution for 3a/5=21 equation: 



3a/5=21

We move all terms to the left:

3a/5-(21)=0

We multiply all the terms by the denominator


3a-21*5=0

We add all the numbers together, and all the variables

3a-105=0

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

3a=105

a=105/3

a=35

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