Current location - Training Enrollment Network - Books and materials - The school library has purchased 120 scientific and technological books, 20 more literary books than the newly purchased 1. How many new literature books have you bought? (Equation solving)
The school library has purchased 120 scientific and technological books, 20 more literary books than the newly purchased 1. How many new literature books have you bought? (Equation solving)
Suppose there are x newly purchased literary and artistic books (20 more books means that there are 20 different books between science and technology books and literary and artistic books).
120-( 1/3)*x=20 (both sides are multiplied by 3 at the same time)
360-x=60 (add x on both sides and subtract 60 at the same time, this step is called shifting)