Goal: Think like a mathematician! Read the problem multiple times.
Two groups are going on a trip to a theatre. The first group has 30 students and 4 adult chaperones. The second group has 25 students and 4 adult chaperones. The cost, in dollars, for each student ticket, s, and each adult ticket, a, can be determined using the system of equations below.
30s + 4a = 720
25s + 4a = 620
What is the cost for each student ticket?
Source: Massachusetts Comprehensive Assessment System (MCAS) 2018 Grade 10 release item http://www.doe.mass.edu/mcas/2018/release/gr10-math.pdf
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