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-2x+13=3x-21
We move all terms to the left:
-2x+13-(3x-21)=0
We get rid of parentheses
-2x-3x+21+13=0
We add all the numbers together, and all the variables
-5x+34=0
We move all terms containing x to the left, all other terms to the right
-5x=-34
x=-34/-5
x=6+4/5
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