Write a system of equations to describe the situation below, solve using substitution, and fill
in the blanks.
Students in Mrs. Walter's third grade class are working on times tables, and they
demonstrate mastery by passing tests. Brenna has passed 2 tests so far. Her classmate,
Doug, has passed 9 tests of them. From now on, Brenna plans to take and pass 3 tests per
week. Meanwhile, Doug plans to do 2 per week. At some point, Brenna will catch up to Doug.
How long will it take? How many tests will each child have passed?
weeks, the children will each have passed
tests.