4.2-2.78=a

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Solution for 4.2-2.78=a equation: 



4.2-2.78=a

We move all terms to the left:

4.2-2.78-(a)=0

We add all the numbers together, and all the variables

-1a+1.42=0

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

-a=-1.42

a=-1.42/-1

a=1+0.42/1

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