D-4=2d-9

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Solution for D-4=2d-9 equation: 



-4=2D-9

We move all terms to the left:

-4-(2D-9)=0

We get rid of parentheses

-2D+9-4=0

We add all the numbers together, and all the variables

-2D+5=0

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

-2D=-5

D=-5/-2

D=2+1/2

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