10d+9=19

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Solution for 10d+9=19 equation: 



10d+9=19

We move all terms to the left:

10d+9-(19)=0

We add all the numbers together, and all the variables

10d-10=0

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

10d=10

d=10/10

d=1

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