6x+9x=3x+12x

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Solution for 6x+9x=3x+12x equation: 



6x+9x=3x+12x

We move all terms to the left:

6x+9x-(3x+12x)=0

We add all the numbers together, and all the variables

6x+9x-(+15x)=0

We add all the numbers together, and all the variables

15x-(+15x)=0

We get rid of parentheses

15x-15x=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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