Answer
In $2020,$ the number of tourists in France would be $93$ million, US would have $102$ million, and China would have $137$ million.
Work Step by Step
Let $x$ be the number of tourists in France. Then the number of tourists in the United States is $x+9,000,000$ and the number of tourists in China is $x+44,000,000.$
The conditions of the problem translates to the equation
\begin{array}{l}\require{cancel}
x+(x+9,000,000)+(x+44,000,000)=332,000,000
.\end{array}
Using the properties of equality, then
\begin{array}{l}\require{cancel}
x+x+9,000,000+x+44,000,000=332,000,000
\\\\
3x+53,000,000=332,000,000
\\\\
3x=332,000,000-53,000,000
\\\\
3x=279,000,000
\\\\
x=\dfrac{279,000,000}{3}
\\\\
x=93,000,000
.\end{array}
Hence, in $2020,$ the number of tourists in France would be $93$ million, US would have $102$ million, and China would have $137$ million.
