421=7d-6

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Solution for 421=7d-6 equation: 



421=7d-6

We move all terms to the left:

421-(7d-6)=0

We get rid of parentheses

-7d+6+421=0

We add all the numbers together, and all the variables

-7d+427=0

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

-7d=-427

d=-427/-7

d=+61

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