7d+9d+10=-4d-10

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Solution for 7d+9d+10=-4d-10 equation: 



7d+9d+10=-4d-10

We move all terms to the left:

7d+9d+10-(-4d-10)=0

We add all the numbers together, and all the variables

16d-(-4d-10)+10=0

We get rid of parentheses

16d+4d+10+10=0

We add all the numbers together, and all the variables

20d+20=0

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

20d=-20

d=-20/20

d=-1

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