-21a+28a-6=-10.2*

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Solution for -21a+28a-6=-10.2* equation: 



-21a+28a-6=-10.2*

We move all terms to the left:

-21a+28a-6-(-10.2*)=0

We add all the numbers together, and all the variables

-21a+28a-6-0=0

We add all the numbers together, and all the variables

7a-6=0

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

7a=6

a=6/7

a=6/7

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