13d+15=-4(2d-5)

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Solution for 13d+15=-4(2d-5) equation: 



13d+15=-4(2d-5)

We move all terms to the left:

13d+15-(-4(2d-5))=0



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

-4(2d-5)

We multiply parentheses

-8d+20

Back to the equation:

-(-8d+20)



We get rid of parentheses

13d+8d-20+15=0

We add all the numbers together, and all the variables

21d-5=0

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

21d=5

d=5/21

d=5/21

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