7+9d-(7d+3)=0

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Solution for 7+9d-(7d+3)=0 equation: 



7+9d-(7d+3)=0

We get rid of parentheses

9d-7d-3+7=0

We add all the numbers together, and all the variables

2d+4=0

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

2d=-4

d=-4/2

d=-2

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