-0.4a+12=3.6

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Solution for -0.4a+12=3.6 equation: 



-0.4a+12=3.6

We move all terms to the left:

-0.4a+12-(3.6)=0

We add all the numbers together, and all the variables

-0.4a+8.4=0

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

-0.4a=-8.4

a=-8.4/-0.4

a=+21

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