num1bori
25.06.2019 •
Mathematics
Can someone make a formula for this problem?
Solved
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Ответ:
Step-by-step explanation:
solution 1 :
adult : 7 - x
child : x
total spend : 54.50 = (7 - x) * 9.5 + x * 6.5
we solve : 54.50 = 66.5 - 3x , x = 4
solution 1 :
adult : y
child : x
x + y = 7(1)
total spend : 54.50 = y * 9.5 + x * 6.5(2)
we solve : x= 4 , y = 3
Ответ: