42=d-7

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Solution for 42=d-7 equation: 



42=d-7

We move all terms to the left:

42-(d-7)=0

We get rid of parentheses

-d+7+42=0

We add all the numbers together, and all the variables

-1d+49=0

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

-d=-49

d=-49/-1

d=+49

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