Question: How do I do this equation using y, x and variables and using a solving method (substitution, elimination) I don't understand how to format or

How do I do this equation using y, x and variables and using a solving method (substitution, elimination) I don't understand how to format or make this Or where to put the numbers.

19. Carl travelled the 1900 km from his home in Eastern Ontario to Winnipeg. He travelled by bus to Toronto at an average speed of 60 km/h and then flew to Winnipeg at an average speed of 700 km/h. His total travelling time was 7 h. How many kilometres did he travel by bus? How far did he travel by airplane

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