anonymous
  • anonymous
Solve these systems of equations 7x+2y= -3 and -14x-4y=6 . I got y=3/2, x= -6/7 am I right ?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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AravindG
  • AravindG
hmm multiply first equation with 2
AravindG
  • AravindG
14x+4y=-6
AravindG
  • AravindG
14x+4y+6=0

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More answers

anonymous
  • anonymous
well yeah i did that multiplying it by -2 so that when i add it in the second question -14x and 14X cancel out (I'm using linear combinations here)
AravindG
  • AravindG
-14x+4y-6=0
anonymous
  • anonymous
*equation
AravindG
  • AravindG
if thats the case both x and y cancels out!!
AravindG
  • AravindG
isnt it?
anonymous
  • anonymous
In the first equation you do 2y times -2 = -4y. Now in the 2nd equation you have -4y soo -4y+ -4y is -8y which means that the ys don't cancel out
AravindG
  • AravindG
nt really :)
AravindG
  • AravindG
infact both these lines are the same !!
AravindG
  • AravindG
take a look at the graph
AravindG
  • AravindG
http://www.wolframalpha.com/input/?i=solve+7x%2B2y%3D+-3++and+-14x-4y%3D6
anonymous
  • anonymous
yes I see...so there's something I'm doing wrong in my math here !
anonymous
  • anonymous
u were right they are the same line!
AravindG
  • AravindG
take a look at the question you have posted !!
AravindG
  • AravindG
:P yep makes sure u type the qns right :)

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