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70x-50=70x-(100/2)
We move all terms to the left:
70x-50-(70x-(100/2))=0
We add all the numbers together, and all the variables
70x-(70x-50)-50=0
We get rid of parentheses
70x-70x+50-50=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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