-1.8+3.5a=12.2

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Solution for -1.8+3.5a=12.2 equation: 



-1.8+3.5a=12.2

We move all terms to the left:

-1.8+3.5a-(12.2)=0

We add all the numbers together, and all the variables

3.5a-14=0

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

3.5a=14

a=14/3.5

a=4

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