Can sb please tell me the answer

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project