anonymous
  • anonymous
solve using elimination method: 2x – y = 8, y = 5x + 3
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
do I change 2nd equation to : 5x -y =3? I am confused
jhonyy9
  • jhonyy9
so yes you are right and after this for we can eliminet the term of y so for we need multiply first equation by -1 and after this you assum thses two equations
jhonyy9
  • jhonyy9
2x-y=8 5x-y=-3

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jhonyy9
  • jhonyy9
sorry 5x-y=-3 will be correct
anonymous
  • anonymous
so, how do I eliminate for the 'y' variable? do I multiply the reciprocal of one 'y' variable to one equation? Like for the 1st equation I would multiply '1' to eliminate the 'y'?
anonymous
  • anonymous
oh wait...I meant '-1' instead of 1
jhonyy9
  • jhonyy9
so 2x-y=8 5x-y=-3 multiply by -1 2x-y=8 -5x+y=3 ----------- -3x 0 =11 3x= - 11 x= -11/3
jhonyy9
  • jhonyy9
ok ?
jhonyy9
  • jhonyy9
and now calcule the y
anonymous
  • anonymous
then I get -2x + y = -8, then I add or subtract to 5x - y = -3? ---oh ok tyty
jhonyy9
  • jhonyy9
and now you can calcule the y yes ?
jhonyy9
  • jhonyy9
camon i will wait it
jhonyy9
  • jhonyy9
so if right ok than thank you the medal good luck bye
jhonyy9
  • jhonyy9
so if right ok than thank you the medal good luck bye
jhonyy9
  • jhonyy9
so y= 5x+3 y=5(-11/3) +3 =-55/3 +3 = (-55+9)/3 = -46/3
jhonyy9
  • jhonyy9
ok ?
anonymous
  • anonymous
yes thank you!
jhonyy9
  • jhonyy9
ok medal please
anonymous
  • anonymous
are you helping out people just to get a medal? that's a little wrong. you should help others out in the spirit of helpfulness, not greed!
jhonyy9
  • jhonyy9
no just for medal but just than the exersice will be signed solved right sure
jhonyy9
  • jhonyy9
or you need again learning on this website how make the things

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