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4+3+x=2x-1
We move all terms to the left:
4+3+x-(2x-1)=0
We add all the numbers together, and all the variables
x-(2x-1)+7=0
We get rid of parentheses
x-2x+1+7=0
We add all the numbers together, and all the variables
-1x+8=0
We move all terms containing x to the left, all other terms to the right
-x=-8
x=-8/-1
x=+8
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