3d=(20-d)4

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Solution for 3d=(20-d)4 equation: 



3d=(20-d)4

We move all terms to the left:

3d-((20-d)4)=0

We add all the numbers together, and all the variables

3d-((-1d+20)4)=0



We calculate terms in parentheses: -((-1d+20)4), so:

(-1d+20)4

We multiply parentheses

-4d+80

Back to the equation:

-(-4d+80)



We get rid of parentheses

3d+4d-80=0

We add all the numbers together, and all the variables

7d-80=0

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

7d=80

d=80/7

d=11+3/7

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