128=-7d+9

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Solution for 128=-7d+9 equation: 



128=-7d+9

We move all terms to the left:

128-(-7d+9)=0

We get rid of parentheses

7d-9+128=0

We add all the numbers together, and all the variables

7d+119=0

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

7d=-119

d=-119/7

d=-17

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