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21x+1850+4500=30x-9x+6350
We move all terms to the left:
21x+1850+4500-(30x-9x+6350)=0
We add all the numbers together, and all the variables
21x-(21x+6350)+1850+4500=0
We add all the numbers together, and all the variables
21x-(21x+6350)+6350=0
We get rid of parentheses
21x-21x-6350+6350=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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