Math
posted by ConfusedStudent .
A quiz had some 3point and some 4point questions. A perfect score was 100 points. Find out how many questions were of each type if there were a total of 31 questions on the quiz
I have no clue how to start this.

X 3pt questions.
(31x) 4pt question.
3x + 4(31x) = 100 Points.
3x + 124 4x = 100
x = 100124 = 24
X = 24. 3pt questions.
(31x) = 3124 = 7 4pt questions.