edjiejwi
24.10.2019 •
Mathematics
Nathan attends soccer camp 5 days a week. soccer camp lasts for 7 weeks.
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Ответ:
Ответ:
Step-by-step explanation:
Let the number of coupon books be c and recipe books be r.
Then we have following equations:
c + r = 4212c + 7.5r = 441Substitute r in the second equation and solve for c:
r = 42 - c12c + 7.5(42 - c) = 44112c - 7.5c + 315 = 4414.5c = 441 - 3154.5c = 126c = 126/4.5c = 28