1-8d+1=9-9d

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Solution for 1-8d+1=9-9d equation: 



1-8d+1=9-9d

We move all terms to the left:

1-8d+1-(9-9d)=0

We add all the numbers together, and all the variables

-8d-(-9d+9)+1+1=0

We add all the numbers together, and all the variables

-8d-(-9d+9)+2=0

We get rid of parentheses

-8d+9d-9+2=0

We add all the numbers together, and all the variables

d-7=0

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

d=7

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