Answer:
120 smokers died from lung cancer
Explanation:
Let's let x = the number of people that died that were NON-smokers.
That means that 2x = the number that died that were smokers.
The total of nonsmokers + smokers = 180.
So
x + 2x = 180
3x = 180
x = 60
So 60 NON-smokers and 120 smokers. 60 + 120 = 180