Question

A 3” x 5” photo is enlarged so that the length of the new photo is 7 inches. Find the width of the new photo.

Answer 1

3x5
?x7

so you are solving for the question mark

Answer 2

you cross product with the rest.. so it will look like this

3*7=21
5*x=5x

Answer 3

next you get 5x=21 so then you divide 21 by 5 which is going to end up x=4.2

so the picture size is 4.2x7