12x+3x=4x+5x

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Solution for 12x+3x=4x+5x equation: 



12x+3x=4x+5x

We move all terms to the left:

12x+3x-(4x+5x)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

15x-(+9x)=0

We get rid of parentheses

15x-9x=0

We add all the numbers together, and all the variables

6x=0

x=0/6

x=0

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