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