How do i start this i need step by step i don't get this at all

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

Math it's appreciated. (picture provided)

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π