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9-2(x+4)=19
We move all terms to the left:
9-2(x+4)-(19)=0
We add all the numbers together, and all the variables
-2(x+4)-10=0
We multiply parentheses
-2x-8-10=0
We add all the numbers together, and all the variables
-2x-18=0
We move all terms containing x to the left, all other terms to the right
-2x=18
x=18/-2
x=-9
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