-3x-21=47-7x

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Solution for -3x-21=47-7x equation: 



-3x-21=47-7x

We move all terms to the left:

-3x-21-(47-7x)=0

We add all the numbers together, and all the variables

-3x-(-7x+47)-21=0

We get rid of parentheses

-3x+7x-47-21=0

We add all the numbers together, and all the variables

4x-68=0

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

4x=68

x=68/4

x=17

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