Answer
Total number of words $=2151\; thousand$.
Number of words in Japanese $=232\; thousand$.
Number of words in English $=999\; thousand$.
Number of words in Chinese is $=500\; thousand$.
Work Step by Step
Let the number of words in Japanese is $=x$.
Therefore the number of words in English is $=x+767\;thousand$.
and the number of words in Chinese is $=x+268\; thousand$.
Total number of words in these three languages is $=1731\;thousand$.
The equation is
$\Rightarrow x+x+767+x+268=1731$
Add like terms.
$\Rightarrow 3x+1035=1731$
Subtract $1035$ from both sides.
$\Rightarrow 3x+1035-1035=1731-1035$
Simplify.
$\Rightarrow 3x=696$
Divide both sides by $3$.
$\Rightarrow x=232$
Number of words in Japanese is $=232\; thousand$.
Number of words in English is $=232+767=999\; thousand$.
Number of words in Chinese is $=232+268=500\; thousand$.
Total number of words in the five languages is:
$=232+999+500+225+195$
$=2151\; thousand$.
