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