The sum of a number x and twenty-one

3/2= 12/x

Step-by-step explanation:

Side length of square = 12 inches.

Now we are given that Michel uses the scale drawing and the scale factor to enlarge a square

Scale Factor = 3 in. : 2 m

Now let the side of enlarged square be x

So, Using scale factor

Thus the side of enlarged square is 8 m

So,  proportion could Michel use to solve the side length, x, of the enlarged square

Hence Option D is correct.

Read more on -