matthew30 matthew30

23-07-2017
Mathematics

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what is price of 8 adult tickets and 5 children's tickets if the total price is 177.50

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texaschic101 texaschic101

23-07-2017

8a + 5c = 177.5...(-6)
12a + 6c = 255....(5)
-------------------------
-48a - 30c = -1065...result of multiplying by -6
60a + 30c = 1275...result of multiplying by 5
------------------------add
12a = 210
a = 210/12
a = 17.50 <====adults

12a + 6c = 255
12(17.5) + 6c = 255
210 + 6c = 255
6c = 255 - 210
6c = 45
c = 45/6
c = 7.50 <=== kids

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