7x-21=33+4x

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Solution for 7x-21=33+4x equation: 



7x-21=33+4x

We move all terms to the left:

7x-21-(33+4x)=0

We add all the numbers together, and all the variables

7x-(4x+33)-21=0

We get rid of parentheses

7x-4x-33-21=0

We add all the numbers together, and all the variables

3x-54=0

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

3x=54

x=54/3

x=18

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