Asked by Team A
As a team we are having trouble coming up with the same ordered pairs for the following 7x+6y=15 and -7x+y=27. We came up with (17,-8) can you show your steps please
Answers
Answered by
drwls
Try your team's (17, -8) answer in the original equations and you will realize it doesn't work.
Add the two equations together and you eliminate the x term, and get
7y = 42
which leads to y = 6
Since 7x = 15 - 6y,
7x = 15 - 36 = -21
x = -3
Add the two equations together and you eliminate the x term, and get
7y = 42
which leads to y = 6
Since 7x = 15 - 6y,
7x = 15 - 36 = -21
x = -3
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