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13x-(3x+12)-5x=7x-(5x-3
We move all terms to the left:
13x-(3x+12)-5x-(7x-(5x-3)=0
We add all the numbers together, and all the variables
8x-(3x+12)-(7x-(5x-3)=0
We get rid of parentheses
8x-3x-(7x-(5x-3)-12=0
We add all the numbers together, and all the variables
5x-(7x-(5x-3)-12=0
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