-4x+9=-21+6x

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Solution for -4x+9=-21+6x equation: 



-4x+9=-21+6x

We move all terms to the left:

-4x+9-(-21+6x)=0

We add all the numbers together, and all the variables

-4x-(6x-21)+9=0

We get rid of parentheses

-4x-6x+21+9=0

We add all the numbers together, and all the variables

-10x+30=0

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

-10x=-30

x=-30/-10

x=+3

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