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1x+3=6x+9
We move all terms to the left:
1x+3-(6x+9)=0
We add all the numbers together, and all the variables
x-(6x+9)+3=0
We get rid of parentheses
x-6x-9+3=0
We add all the numbers together, and all the variables
-5x-6=0
We move all terms containing x to the left, all other terms to the right
-5x=6
x=6/-5
x=-1+1/5
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