4x-9=-6x+21

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



4x-9=-6x+21

We move all terms to the left:

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