12d+5=7d+20

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Solution for 12d+5=7d+20 equation: 



12d+5=7d+20

We move all terms to the left:

12d+5-(7d+20)=0

We get rid of parentheses

12d-7d-20+5=0

We add all the numbers together, and all the variables

5d-15=0

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

5d=15

d=15/5

d=3

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