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Find the ordered triple, (p,q,r)

 

p + 2q = 0

q - 2r = 0

p + r = 8

 Feb 12, 2022
 #1
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Hint: in any one of the equations, manipulate it to leave an equation that gives one variable in terms of another. Plug this into a different equation. What do you get?

 

For example, since p+r=8, we know that p=8-r (subtract r from both sides). Plugging this in to p+2q=0 gives 8-r+2q=0.

Doing this will eventually eliminate the variables so you're left with a simpler system.

 Feb 12, 2022

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