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42x+x=42-x+x
We move all terms to the left:
42x+x-(42-x+x)=0
We add all the numbers together, and all the variables
42x+x-42=0
We add all the numbers together, and all the variables
43x-42=0
We move all terms containing x to the left, all other terms to the right
43x=42
x=42/43
x=42/43
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