40d-30=-5(-2-4d)

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Solution for 40d-30=-5(-2-4d) equation: 



40d-30=-5(-2-4d)

We move all terms to the left:

40d-30-(-5(-2-4d))=0

We add all the numbers together, and all the variables

40d-(-5(-4d-2))-30=0



We calculate terms in parentheses: -(-5(-4d-2)), so:

-5(-4d-2)

We multiply parentheses

20d+10

Back to the equation:

-(20d+10)



We get rid of parentheses

40d-20d-10-30=0

We add all the numbers together, and all the variables

20d-40=0

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

20d=40

d=40/20

d=2

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