Aspring has an original length l inches. when a weight of x pounds is suspended from the spring, its new length y is given by the formula y = l + x k , where k is a constant, measured in pounds per inch. solve the formula for x. show the steps in your work. the value of k for a certain spring is 2.5. the length of the spring is found to be double its original length when a 10 pound weight is suspended from it. write the equation for the original length of the spring and solve it. show the steps in your work.