81-2q=7q

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Solution for 81-2q=7q equation: 



81-2q=7q

We move all terms to the left:

81-2q-(7q)=0

We add all the numbers together, and all the variables

-9q+81=0

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

-9q=-81

q=-81/-9

q=+9

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