Your teacher is giving you a test worth 100 points containing 40 questions. There are two point questions and four point questions on the test. How many of each type of question is on the test.
x = 2 pointers then 40-x = 4 pointers
x(2) + (40 -x)(4) = 100
2x +160 - 4x = 100
-2x = -60
x = 30 two-pointers 40 -x = 40 - 30 = 10 four pointers