-11+20=13-2d

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Solution for -11+20=13-2d equation: 



-11+20=13-2d

We move all terms to the left:

-11+20-(13-2d)=0

We add all the numbers together, and all the variables

-(-2d+13)-11+20=0

We add all the numbers together, and all the variables

-(-2d+13)+9=0

We get rid of parentheses

2d-13+9=0

We add all the numbers together, and all the variables

2d-4=0

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

2d=4

d=4/2

d=2

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