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Mathematics 14 Online
OpenStudy (anonymous):

5x+y=0 5x+2y=30 Solve by elimination need help to make sure im right :D

OpenStudy (anonymous):

using linear algebra or substitution?

OpenStudy (anonymous):

y=30, right?

OpenStudy (anonymous):

Use the elimination method

hero (hero):

-5x-y = 0 5x + 2y = 30 y = 30 x=-6

OpenStudy (anonymous):

y=30 by multiplying the 2nd eqn by -1 and adding the two eqns, you eleminate x

OpenStudy (anonymous):

Thank you both Hero for quick answer and joojoo for explanation :D.

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