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Firdavs [7]
4 years ago
11

on tuesday, 525 people bought tickets to the county fair. tickets cost $7 for adults and $3 for children. the total revenue from

ticket sales on tuesday was $2775. the system of equations below represents the number of people and total sales for the county fair on tuesday, where x represents the number of child tickets and y represents the number of adult tickets. how many adult tickets were sold on tuesday? a.280 b.340 c.300 d.225
Mathematics
1 answer:
motikmotik4 years ago
4 0
C + a = 525.....multiply by -3
3c + 7a = 2775
-------------------
-3c - 3a = - 1575 (result of multiplying by -3)
3c + 7a = 2775
--------------------add
4a = 1200
a = 1200/4
a = 300 <== adult tickets sold 
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