69=7d+20

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Solution for 69=7d+20 equation: 



69=7d+20

We move all terms to the left:

69-(7d+20)=0

We get rid of parentheses

-7d-20+69=0

We add all the numbers together, and all the variables

-7d+49=0

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

-7d=-49

d=-49/-7

d=+7

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