a test is worth 90 points and contains 25 questions. multiple-choice questions are worth 3 points each and word problems are worth 4 points. How many of each type of question are there?
m + w = 253m + 4w = 90 Let's do substitution, first by solving the first equation for m. m = 25 - w Substitute! 3(25 - w) + 4w = 9075 - 3w + 4w = 90w = 15 m = 25 - 15 = 10 Hope this helps!
