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taskmasters
Let us assume the number of text books sold by keller publishing = x
Then
Then number of text books sold by Scholastic books = 4x
The total number of text books sold = 7775
Then
x + 4x = 7775
5x = 7775
x = 1555
Then
The number of text books sold by Scholastic books = 4x
                                                                                  = 4 * 1555
                                                                                  = 6220

I hope the procedure is clear enough for you to understand.

The number of books scholastic sell is 6,220.

To understand more, check below explanation.

Linear equation:

Let us consider that, Keller publishing x number of books.

Since, scholastic books sells 4 times as many textbooks as Keller publishing.

So that, number of books sells[tex]=4x[/tex]

Total number of books is 7,775.

                   [tex]x+4x=7,775\\\\5x=7,775\\\\x=7,775/5=1,555[/tex]

The number of books scholastic sell[tex]=4x=4*1555=6,220[/tex]

Learn more about the linear equation here:

https://brainly.com/question/14323743

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