It means your solving for x
A because the week would be equal to the 3 books he read
Step-by-step explanation:
hehesjwhwjjwjjwjjwjwjwjwhhw
Oh ok. So I think that x is 83. Because I did this 630-100-121-106-112-108=83. And then I did 630/6 and got 105 and thats the mean.