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Yuri [45]
3 years ago
5

There is a certain number. If you add 30/7 to it, from the sum you get subtract 22/7 , and then subtract that difference from 59

/7 , then you will get 19/7 . What is the certain number? PLEASE HELP!!!!! I WILL AWARD BRAINLIEST AND THANKS, IF A GOOD ANSWER THANKS!!!!!
Mathematics
1 answer:
xeze [42]3 years ago
6 0
30/7 +30/7=60/7
60/7-22/7=38/7
59/7 -38/7=21/7
21/7 -19/7=2/7
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An airplane has 29 seats. The price for a coach seat is $600 in the price for a first class seat is $1050. The airline collected
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Answer:

19 coach seats

Step-by-step explanation:

let the number of coach seats be C and number of first class seats be F

given that the total number of seats is 29,

C + F = 29 ---------(eq 1)

also given that each coach seat = $600, each 1st class seat is $1050 and a total of $21900 was collected,

600C + 1,050F = 21,900 -------(eq 2)

we have 2 equations and 2 unknowns, we can solve the system of equations by elimination

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C = 855 /450

C = 19

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