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3x-(5+x)=-11
We move all terms to the left:
3x-(5+x)-(-11)=0
We add all the numbers together, and all the variables
3x-(x+5)-(-11)=0
We add all the numbers together, and all the variables
3x-(x+5)+11=0
We get rid of parentheses
3x-x-5+11=0
We add all the numbers together, and all the variables
2x+6=0
We move all terms containing x to the left, all other terms to the right
2x=-6
x=-6/2
x=-3
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