8th grade math

How do you simplify problems like

8x + 3 (7x-6)

-9(4x-8) + 2x?


Please help!!
Thank you!

asked by saranghae12
  1. oh yeah and 4(1 + 9x) can u helo with this one too please

    posted by saranghae12
  2. I'll do the first one.

    8x + 3 (7x-6)

    8x + 21x - 18

    29x - 18

    I'll be glad to check your answer for the second problem.

    posted by Ms. Sue
  3. oooh i get the first one now. But wat i am asking is how you do the second problems that are like the second and the third problem.

    posted by saranghae12
  4. You try the second problem. Do it the same way I did the first problem.

    posted by Ms. Sue
  5. i just want you to know that i might be more confused with this because i am a 7th grader and i am in accelerated math so that is why i am doing 8th grade math and this is really hard for me right now so yeah

    posted by saranghae12
  6. If you can't at least try to do the second problem, you don't belong in accelerated math.

    posted by Ms. Sue
  7. ummm is it 6x - 17? im not sure if this is right

    posted by saranghae12
  8. yeah i did ask my teacher if i could go back to regular math but then she decided that she will decide on my quiz score and i got a good grade

    posted by saranghae12
  9. and for the third problem is it this i will do it in the steps:

    4( 1+9x)
    4(1)+ 4(9x)
    4 + 36x

    is this correct?

    posted by saranghae12
  10. The third problem is right.

    For the second problem:

    -9(4x-8) + 2x

    Start by multiplying -9 times 4x and -9 times -8.

    posted by Ms. Sue
  11. ooohhh ok so the second problem would be -36x + 72 + 2x right?

    posted by saranghae12
  12. Right!

    posted by Ms. Sue
  13. oh i get that now. thank you!

    posted by saranghae12
  14. Ooops!

    We forgot to add 2x

    -34x + 72

    posted by Ms. Sue
  15. oh ok i get it now. thank you!!

    posted by saranghae12
  16. You're welcome.

    posted by Ms. Sue

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