Question

comic books cost $2 each and magazines cost $4 each. if you want to spend exactly $30 and you buy 7 comic books, how many magazines can you buy? multiply 2·7 on the left side of the equation. 2c + 4m = 30; 2·7 + 4m = 30; □ + 4m = 30

Explanation:

Step1: Calculate 2·7

$2 \cdot 7 = 14$

Step2: Substitute into the equation

$14 + 4m = 30$

Step3: Isolate the term with m

$4m = 30 - 14$
$4m = 16$

Step4: Solve for m

$m = \frac{16}{4} = 4$

Answer:

First, the value for the box is 14. The number of magazines you can buy is 4.