12+4x=1+x+8

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Solution for 12+4x=1+x+8 equation: 



12+4x=1+x+8

We move all terms to the left:

12+4x-(1+x+8)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

4x-x-9+12=0

We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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