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21x+5=5+13x
We move all terms to the left:
21x+5-(5+13x)=0
We add all the numbers together, and all the variables
21x-(13x+5)+5=0
We get rid of parentheses
21x-13x-5+5=0
We add all the numbers together, and all the variables
8x=0
x=0/8
x=0
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