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-4(5x-9)=-204
We move all terms to the left:
-4(5x-9)-(-204)=0
We add all the numbers together, and all the variables
-4(5x-9)+204=0
We multiply parentheses
-20x+36+204=0
We add all the numbers together, and all the variables
-20x+240=0
We move all terms containing x to the left, all other terms to the right
-20x=-240
x=-240/-20
x=+12
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