-21a+28a-6=10.3

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Solution for -21a+28a-6=10.3 equation: 



-21a+28a-6=10.3

We move all terms to the left:

-21a+28a-6-(10.3)=0

We add all the numbers together, and all the variables

7a-16.3=0

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

7a=16.3

a=16.3/7

a=2+2.3/7

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