4x-21=6-5x

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Solution for 4x-21=6-5x equation: 



4x-21=6-5x

We move all terms to the left:

4x-21-(6-5x)=0

We add all the numbers together, and all the variables

4x-(-5x+6)-21=0

We get rid of parentheses

4x+5x-6-21=0

We add all the numbers together, and all the variables

9x-27=0

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

9x=27

x=27/9

x=3

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