Answer:
16 books
Step-by-step explanation:
We need to translate this word equation to algebraic equation.
We want to find the number of books. Let it be "x".
Also, note "is" means "=".
51 is 4 times, would translate to:
51 = 4 *
a number of books LESS 13, would translate to:
x - 13
Combining, we get:
51 = 4*x - 13
We can now solve for x:
[tex]51 = 4x - 13\\4x=51+13\\4x=64\\x=\frac{64}{4}\\x=16[/tex]
So, the number of books = 16
