x+9=3x+x

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



x+9=3x+x
We move all terms to the left:
x+9-(3x+x)=0
We add all the numbers together, and all the variables
x-(+4x)+9=0
We get rid of parentheses
x-4x+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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