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

 

p + 2q = 0

q - 2r = 0

p + r = 5

 Jun 26, 2021

Best Answer 

 #1
avatar+33551 
+2

p + 2q = 0

q - 2r = 0

p + r = 5            multiply by 2     2p+2r=10    add to second equation to get

 

q +2p = 10      multiply by -2      -2q-4p= -20   add to top equation

 

-3p = -20      p = 20/3        then r = - 5/3   (from third equation)      and q = ________    (you can finish !)

 Jun 26, 2021
edited by ElectricPavlov  Jun 26, 2021
 #1
avatar+33551 
+2
Best Answer

p + 2q = 0

q - 2r = 0

p + r = 5            multiply by 2     2p+2r=10    add to second equation to get

 

q +2p = 10      multiply by -2      -2q-4p= -20   add to top equation

 

-3p = -20      p = 20/3        then r = - 5/3   (from third equation)      and q = ________    (you can finish !)

ElectricPavlov Jun 26, 2021
edited by ElectricPavlov  Jun 26, 2021

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