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77+20x=400+20x
We move all terms to the left:
77+20x-(400+20x)=0
We add all the numbers together, and all the variables
20x-(20x+400)+77=0
We get rid of parentheses
20x-20x-400+77=0
We add all the numbers together, and all the variables
-323!=0
There is no solution for this equation
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