20-7q=-1

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Solution for 20-7q=-1 equation: 



20-7q=-1

We move all terms to the left:

20-7q-(-1)=0

We add all the numbers together, and all the variables

-7q+21=0

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

-7q=-21

q=-21/-7

q=+3

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