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8=2(1+x)
We move all terms to the left:
8-(2(1+x))=0
We add all the numbers together, and all the variables
-(2(x+1))+8=0
We calculate terms in parentheses: -(2(x+1)), so:We get rid of parentheses
2(x+1)
We multiply parentheses
2x+2
Back to the equation:
-(2x+2)
-2x-2+8=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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