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22-03-2017
Mathematics

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Solve the system by the elimination method. Check your work. R - 9S = 2 3R - 3S = -10

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22-03-2017

-3(r-9s=2)+(3r-3s=-10)

24s=-16

s=-2/3, now using either original equation we can solve for r.

3r-3s=-10 becomes:

3r+2=-10

3r=-12

r=-4 so the solution is the point:

(s,r)=(-2/3, -4)

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