1x+9=12-3x

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Solution for 1x+9=12-3x equation: 



1x+9=12-3x

We move all terms to the left:

1x+9-(12-3x)=0

We add all the numbers together, and all the variables

1x-(-3x+12)+9=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

x+3x-12+9=0

We add all the numbers together, and all the variables

4x-3=0

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

4x=3

x=3/4

x=3/4

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