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jagr2713

  • one year ago

-x-3y=-11 y=8x-13 Solve by substitution

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  1. jagr2713
    • one year ago
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    @nincompoop @Nnesha

  2. anonymous
    • one year ago
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    wow this is tricky but i think i can figure it out

  3. jagr2713
    • one year ago
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    Yes I tricking me

  4. Nnesha
    • one year ago
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    well 2nd equation is already solved for y so substitute y for 2nd equation into -x-3y=-11

  5. jagr2713
    • one year ago
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    ohhhh so we just solve for the fist equation? so we get 3y=x-11

  6. Nnesha
    • one year ago
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    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

  7. jagr2713
    • one year ago
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    so just plug the 2nd and put for x above or?

  8. Nnesha
    • one year ago
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    y=8x -13 so you can replace y with 8x-13 \[\huge\rm -x-3\color{ReD}{y}=-11\]

  9. Nnesha
    • one year ago
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    y=8x-13 so replace y not x

  10. jagr2713
    • one year ago
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    ohoho so we get -x-3(8x-13)=-11 -x-24x+39=-11 -25x+39=-11 -25x=-50 x=2

  11. jagr2713
    • one year ago
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    then now we plug it into y=8x-13 y=8(2)-13 y=3

  12. Nnesha
    • one year ago
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    perfect!

  13. jagr2713
    • one year ago
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    wow that was easy I just got lost because it came with an extra number :D

  14. Nnesha
    • one year ago
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    wait a sec hmm

  15. jagr2713
    • one year ago
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    I got it correct no need :D

  16. Nnesha
    • one year ago
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    lol i was just checking

  17. Nnesha
    • one year ago
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    good job! :D

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