posted by saranghae12

How do you simplify problems like

8x + 3 (7x-6)

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

Thank you!

1. saranghae12

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

2. Ms. Sue

I'll do the first one.

8x + 3 (7x-6)

8x + 21x - 18

29x - 18

3. saranghae12

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.

4. Ms. Sue

You try the second problem. Do it the same way I did the first problem.

5. saranghae12

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

6. Ms. Sue

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

7. saranghae12

ummm is it 6x - 17? im not sure if this is right

8. saranghae12

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

9. saranghae12

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?

10. Ms. Sue

The third problem is right.

For the second problem:

-9(4x-8) + 2x

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

11. saranghae12

ooohhh ok so the second problem would be -36x + 72 + 2x right?

12. Ms. Sue

Right!

13. saranghae12

oh i get that now. thank you!

14. Ms. Sue

Ooops!

-34x + 72

15. saranghae12

oh ok i get it now. thank you!!

16. Ms. Sue

You're welcome.

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