12x+9=15-4x

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Solution for 12x+9=15-4x equation: 



12x+9=15-4x

We move all terms to the left:

12x+9-(15-4x)=0

We add all the numbers together, and all the variables

12x-(-4x+15)+9=0

We get rid of parentheses

12x+4x-15+9=0

We add all the numbers together, and all the variables

16x-6=0

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

16x=6

x=6/16

x=3/8

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