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2x+13=45+x
We move all terms to the left:
2x+13-(45+x)=0
We add all the numbers together, and all the variables
2x-(x+45)+13=0
We get rid of parentheses
2x-x-45+13=0
We add all the numbers together, and all the variables
x-32=0
We move all terms containing x to the left, all other terms to the right
x=32
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