jagr2713
  • jagr2713
-x-3y=-11 y=8x-13 Solve by substitution
Mathematics
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jagr2713
  • jagr2713
-x-3y=-11 y=8x-13 Solve by substitution
Mathematics
jamiebookeater
  • jamiebookeater
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jagr2713
  • jagr2713
anonymous
  • anonymous
wow this is tricky but i think i can figure it out
jagr2713
  • jagr2713
Yes I tricking me

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Nnesha
  • Nnesha
well 2nd equation is already solved for y so substitute y for 2nd equation into -x-3y=-11
jagr2713
  • jagr2713
ohhhh so we just solve for the fist equation? so we get 3y=x-11
Nnesha
  • Nnesha
for substitution you need to solve one of the equation for x `or` y but 2nd equation is already solved for y then just plug that into the first equation
jagr2713
  • jagr2713
so just plug the 2nd and put for x above or?
Nnesha
  • Nnesha
y=8x -13 so you can replace y with 8x-13 \[\huge\rm -x-3\color{ReD}{y}=-11\]
Nnesha
  • Nnesha
y=8x-13 so replace y not x
jagr2713
  • jagr2713
ohoho so we get -x-3(8x-13)=-11 -x-24x+39=-11 -25x+39=-11 -25x=-50 x=2
jagr2713
  • jagr2713
then now we plug it into y=8x-13 y=8(2)-13 y=3
Nnesha
  • Nnesha
perfect!
jagr2713
  • jagr2713
wow that was easy I just got lost because it came with an extra number :D
Nnesha
  • Nnesha
wait a sec hmm
jagr2713
  • jagr2713
I got it correct no need :D
Nnesha
  • Nnesha
lol i was just checking
Nnesha
  • Nnesha
good job! :D

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