You are taking a test worth 200 points. There is a total of 30 five-point and ten-point questions. How many five-point questions are on the test?
Let the number of 5-point questions =F
Then, the number of 10-point questions =30 - F
5F + 10[30 - F] = 200
F = 20 Five-point questions
30 - 20 = 10 Ten-point questions.