Sua
Solving by Substitution
Mr. Martin's math test, which is worth 100 points, has 29
problems. Each problem is worth either 5 points or 2
points.
Let x be the number of questions worth 5 points and let y
be the number of questions worth 2 points.
x + y = 29, 5x + 2y = 100
How many problems of each point value are on the
test?
10 problems worth 5 points and 25 problems worth
2 points
14 problems worth 5 points and 15 problems worth
2 points
16 problems worth 5 points and 13 problems worth
2 points
15 problems worth 5 points and 13 problems worth
2 points
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