.8a-7=9

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Solution for .8a-7=9 equation: 



.8a-7=9

We move all terms to the left:

.8a-7-(9)=0

We add all the numbers together, and all the variables

.8a-16=0

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

.8a=16

a=16/.8

a=20

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