George's page contains twice as many typed words as Bill's page and Bill's page contains 50 fewer words than George's page. If each person can type 60 words per minute, after one minute, the difference between twice the number of words on Bill's page and the number of words on George's page is 210. How many words did Bill's page contain initially?

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]