3=-12+3d

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Solution for 3=-12+3d equation: 



3=-12+3d

We move all terms to the left:

3-(-12+3d)=0

We add all the numbers together, and all the variables

-(3d-12)+3=0

We get rid of parentheses

-3d+12+3=0

We add all the numbers together, and all the variables

-3d+15=0

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

-3d=-15

d=-15/-3

d=+5

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