20-9d+5=-19d-15

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Solution for 20-9d+5=-19d-15 equation: 



20-9d+5=-19d-15

We move all terms to the left:

20-9d+5-(-19d-15)=0

We add all the numbers together, and all the variables

-9d-(-19d-15)+25=0

We get rid of parentheses

-9d+19d+15+25=0

We add all the numbers together, and all the variables

10d+40=0

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

10d=-40

d=-40/10

d=-4

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