4+0.4a=8

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Solution for 4+0.4a=8 equation: 



4+0.4a=8

We move all terms to the left:

4+0.4a-(8)=0

We add all the numbers together, and all the variables

0.4a-4=0

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

0.4a=4

a=4/0.4

a=10

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