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21x-9-17x=3+16x-9-12x+17
We move all terms to the left:
21x-9-17x-(3+16x-9-12x+17)=0
We add all the numbers together, and all the variables
21x-17x-(4x+11)-9=0
We add all the numbers together, and all the variables
4x-(4x+11)-9=0
We get rid of parentheses
4x-4x-11-9=0
We add all the numbers together, and all the variables
-20!=0
There is no solution for this equation
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