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2x+(x+1)=50
We move all terms to the left:
2x+(x+1)-(50)=0
We get rid of parentheses
2x+x+1-50=0
We add all the numbers together, and all the variables
3x-49=0
We move all terms containing x to the left, all other terms to the right
3x=49
x=49/3
x=16+1/3
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