x=4,x-9

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Solution for x=4,x-9 equation: 



x=4.x-9

We move all terms to the left:

x-(4.x-9)=0

We get rid of parentheses

x-4.x+9=0

We add all the numbers together, and all the variables

-3x+9=0

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

-3x=-9

x=-9/-3

x=+3

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