7.9+a=12.4

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Solution for 7.9+a=12.4 equation: 



7.9+a=12.4

We move all terms to the left:

7.9+a-(12.4)=0

We add all the numbers together, and all the variables

a-4.5=0

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

a=4.5

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