9x+x=9x-4

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Solution for 9x+x=9x-4 equation: 



9x+x=9x-4

We move all terms to the left:

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

We add all the numbers together, and all the variables

10x-(9x-4)=0

We get rid of parentheses

10x-9x+4=0

We add all the numbers together, and all the variables

x+4=0

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

x=-4

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