Question

what number must be subtracted from each of 9,11,15,and19 so that the difference will be proportional.​

Answer 1

Answer:

answer is 3

Step-by-step explanation:

9-x: 11-x :: 15-x: 19-x

9-x*19-x=11-x *15-x

171-19x-9x+x square= -11x-15x+165+x square

171-28x = -26x +165

2x=6

x=3