7x-3=21x

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Solution for 7x-3=21x equation: 



7x-3=21x

We move all terms to the left:

7x-3-(21x)=0

We add all the numbers together, and all the variables

-14x-3=0

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

-14x=3

x=3/-14

x=-3/14

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