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-7(3x+2)=-21x+4
We move all terms to the left:
-7(3x+2)-(-21x+4)=0
We multiply parentheses
-21x-(-21x+4)-14=0
We get rid of parentheses
-21x+21x-4-14=0
We add all the numbers together, and all the variables
-18!=0
There is no solution for this equation
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