12,4=a+7.9

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Solution for 12,4=a+7.9 equation: 



12.4=a+7.9

We move all terms to the left:

12.4-(a+7.9)=0

We get rid of parentheses

-a-7.9+12.4=0

We add all the numbers together, and all the variables

-1a+4.5=0

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

-a=-4.5

a=-4.5/-1

a=4+0.5/1

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