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x=2x+9(-2)=-10
We move all terms to the left:
x-(2x+9(-2))=0
We calculate terms in parentheses: -(2x+9(-2)), so:We get rid of parentheses
2x+9(-2)
We add all the numbers together, and all the variables
2x-18
Back to the equation:
-(2x-18)
x-2x+18=0
We add all the numbers together, and all the variables
-1x+18=0
We move all terms containing x to the left, all other terms to the right
-x=-18
x=-18/-1
x=+18
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