7x-21=84;x

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Solution for 7x-21=84;x equation: 



7x-21=84x

We move all terms to the left:

7x-21-(84x)=0

We add all the numbers together, and all the variables

-77x-21=0

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

-77x=21

x=21/-77

x=-3/11

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