4x-6+8x=9x+21

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Solution for 4x-6+8x=9x+21 equation: 



4x-6+8x=9x+21

We move all terms to the left:

4x-6+8x-(9x+21)=0

We add all the numbers together, and all the variables

12x-(9x+21)-6=0

We get rid of parentheses

12x-9x-21-6=0

We add all the numbers together, and all the variables

3x-27=0

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

3x=27

x=27/3

x=9

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