4+7x=12+9x

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Solution for 4+7x=12+9x equation: 



4+7x=12+9x

We move all terms to the left:

4+7x-(12+9x)=0

We add all the numbers together, and all the variables

7x-(9x+12)+4=0

We get rid of parentheses

7x-9x-12+4=0

We add all the numbers together, and all the variables

-2x-8=0

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

-2x=8

x=8/-2

x=-4

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