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Mathematics 18 Online
OpenStudy (anonymous):

4x + y = 6 3x + 7y = 17 A. (-1, 10) B. (1, 2) C. (8, -1) D. (3, -6)

OpenStudy (welshfella):

multiply the first equation by -7 and add

OpenStudy (welshfella):

this way you'll eliminate y and get an equation in x only

OpenStudy (anonymous):

or you could plug in each coordinate and see which works and which doesn't work, but that takes a long time and is ineffiecent

OpenStudy (anonymous):

im confused.

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