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2x+20=2(25+5)-45
We move all terms to the left:
2x+20-(2(25+5)-45)=0
We add all the numbers together, and all the variables
2x+20-(230-45)=0
We add all the numbers together, and all the variables
2x-165=0
We move all terms containing x to the left, all other terms to the right
2x=165
x=165/2
x=82+1/2
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