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There are 520'pages in the whole book because if you divide 390 by 3 you get 130 and if you multiply that by 4 you get 520, hope this helps! Please give brainiest answer and say thanks.

As per linear equation, there are 520 pages in the entire book.

What is a linear equation?

A linear equation is an equation that contains one or multiple variables with the highest power of the variable is 1.

Given, Tanya has read 3/4 of a book.

She read 390 pages of the book.

Let, the entire book has 'x' pages.

Therefore, 3x/4 = 390

⇒ x = 390 × 4/3

⇒ x = 520

Therefore, the entire book has 520 pages.

Learn more about linear equation here: https://brainly.com/question/19595705

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