The sum of two numbers is 32 . one number is 3 times as large as the other. what are the numbers?

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /