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x+2x=3x-100
We move all terms to the left:
x+2x-(3x-100)=0
We add all the numbers together, and all the variables
3x-(3x-100)=0
We get rid of parentheses
3x-3x+100=0
We add all the numbers together, and all the variables
100!=0
There is no solution for this equation
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