20d-9+2d=19+20d

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Solution for 20d-9+2d=19+20d equation: 



20d-9+2d=19+20d

We move all terms to the left:

20d-9+2d-(19+20d)=0

We add all the numbers together, and all the variables

20d+2d-(20d+19)-9=0

We add all the numbers together, and all the variables

22d-(20d+19)-9=0

We get rid of parentheses

22d-20d-19-9=0

We add all the numbers together, and all the variables

2d-28=0

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

2d=28

d=28/2

d=14

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