21=+14+7x

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Solution for 21=+14+7x equation: 



21=+14+7x

We move all terms to the left:

21-(+14+7x)=0

We add all the numbers together, and all the variables

-(7x+14)+21=0

We get rid of parentheses

-7x-14+21=0

We add all the numbers together, and all the variables

-7x+7=0

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

-7x=-7

x=-7/-7

x=1

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