Solving by Substitution Mr. Martin's math test, which is worth 100 points, has 35 problems. Each problem is worth either 5 points or 2 points. Let x = the number of questions worth 5 points. Let y = the number of questions worth 2 points. x+y = 35, 5x + 2y =100 How many problems of each point value are on the test? O 10 problems worth 5 points and 25 problems worth 2 points O 15 problems worth 5 points and 20 problems worth 2 points O 20 problems worth 5 points and 15 problems worth 2 points O 25 problems worth 5 points and 10 problems worth 2 points​