3x+9+4x+x=3x+13x

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Solution for 3x+9+4x+x=3x+13x equation: 



3x+9+4x+x=3x+13x

We move all terms to the left:

3x+9+4x+x-(3x+13x)=0

We add all the numbers together, and all the variables

3x+4x+x-(+16x)+9=0

We add all the numbers together, and all the variables

8x-(+16x)+9=0

We get rid of parentheses

8x-16x+9=0

We add all the numbers together, and all the variables

-8x+9=0

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

-8x=-9

x=-9/-8

x=1+1/8

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