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-7x+9=2x-1-9x
We move all terms to the left:
-7x+9-(2x-1-9x)=0
We add all the numbers together, and all the variables
-7x-(-7x-1)+9=0
We get rid of parentheses
-7x+7x+1+9=0
We add all the numbers together, and all the variables
10!=0
There is no solution for this equation
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