2(d-20)=-2

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Solution for 2(d-20)=-2 equation: 



2(d-20)=-2

We move all terms to the left:

2(d-20)-(-2)=0

We add all the numbers together, and all the variables

2(d-20)+2=0

We multiply parentheses

2d-40+2=0

We add all the numbers together, and all the variables

2d-38=0

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

2d=38

d=38/2

d=19

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