12+5x=4x+9

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Solution for 12+5x=4x+9 equation: 



12+5x=4x+9

We move all terms to the left:

12+5x-(4x+9)=0

We get rid of parentheses

5x-4x-9+12=0

We add all the numbers together, and all the variables

x+3=0

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

x=-3

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