How can 7 × 2 = 14 be soveld in a number sentence

Mario is constructing a frame for 10 in. by 8 in. photo. he wants the frame to be the same with all the way around in the same area of the frame and photo to be 120 square inches what is the dimension of the frame?

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

If np3 /nc2 = 6, find the value of n