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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