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Mathematics 19 Online
OpenStudy (anonymous):

If you wanted to eliminate the y variable by adding the two equations in the following system, what could be your first step? x − y = 6 4x − 3y = 12 Add the two equations together Multiply the first equation by −4 Multiply the first equation by 3 Multiply the first equation by −3

OpenStudy (anonymous):

multiply first equn. by 3

OpenStudy (anonymous):

all of the bottom three are acceptable steps.

OpenStudy (anonymous):

sorry - u are adding - its multiply first equn. by -3

OpenStudy (anonymous):

If u hv to eliminate by adding, then the two y terms should be of opposite signs i.e. if one is positive the other has to be negative.... so the correct ans is "Multiply the first equation by −3 " This will make the y terms in first equation as + 3y This when added to the - 3y in the second equation will eliminate the y term

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