posted by R .
algebra in 8th your teacher is giving you a test worth 100 points containing 40 questions. There are two-point and four-point questions on the test. how many of each type of questions are on the test?
x two pointers and (40 -x) four pointers
2x + 4(40-x) = 100
2x + 160 - 4x = 100
2x = 60 etc