-21/28=12a/28

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Solution for -21/28=12a/28 equation: 



-21/28=12a/28

We move all terms to the left:

-21/28-(12a/28)=0

We add all the numbers together, and all the variables

-(+12a/28)-21/28=0

We get rid of parentheses

-12a/28-21/28=0

We multiply all the terms by the denominator


-12a-21=0

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

-12a=21

a=21/-12

a=-1+3/4

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