A book costs $3. Mr. Grayson spent $81 on books. The number of books, b, can be found by solving the equation 3b = 81. Which is the best method for solving the equation?

Using division equality property to solve for b. b=27

Step-by-step explanation:

A book cost $3

Mr. Grayson spent $81 on books

Let number of books be b

Total cost invest on book = 3b

This would be equal to $81

Therefore, 3b=81

Now we solve for b

Using division method of equality

If we divide both side by same number in equality. After division we get both are equal.

3b=81

Here we divide by 3 both sides

3b:3=81:3

b=27

Thus, Using division equality property to solve for b. b=27