How do you do thiss ?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Maria solved an equation as shown below. what is the solution to maria’s equation?