1-4a+7.2=21.8

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Solution for 1-4a+7.2=21.8 equation: 



1-4a+7.2=21.8

We move all terms to the left:

1-4a+7.2-(21.8)=0

We add all the numbers together, and all the variables

-4a-13.6=0

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

-4a=13.6

a=13.6/-4

a=-3+1/2.5

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