d+0.21d=1.21d

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Solution for d+0.21d=1.21d equation: 



d+0.21d=1.21d

We move all terms to the left:

d+0.21d-(1.21d)=0

We add all the numbers together, and all the variables

d+0.21d-(+1.21d)=0

We add all the numbers together, and all the variables

1.21d-(+1.21d)=0

We get rid of parentheses

1.21d-1.21d=0

We add all the numbers together, and all the variables

=0

d=0/1

d=0

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