-7d+1+7=-5d+20

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Solution for -7d+1+7=-5d+20 equation: 



-7d+1+7=-5d+20

We move all terms to the left:

-7d+1+7-(-5d+20)=0

We add all the numbers together, and all the variables

-7d-(-5d+20)+8=0

We get rid of parentheses

-7d+5d-20+8=0

We add all the numbers together, and all the variables

-2d-12=0

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

-2d=12

d=12/-2

d=-6

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