Question

-8x + 9x - 21 = -12 -16 Solve for x

Answer 1

Welcome to OpenStudy!

Answer 2

First we need to get - 21 to the right side

Answer 3

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@koolkat13 what do you think we do first?

Answer 4

find out the -12 - 16 which is -28

Answer 5

Yep, that is correct. How do you think we get -21 to the right side?

Answer 6

idk

Answer 7

What is the opposite of subtracting?

Answer 8

adding

Answer 9

Yes, so add 21 to both sides.

Answer 10

ok so now we have -8x + -9x = -7

Answer 11

Just 8x + 9x = -7 :) Combine 8x and 9x

Answer 12

Oh, -8x + 9x

Answer 13

17x my computer is freezing up....grr

Answer 14

I corrected myself, it should be -8x+9x, or 9x-8x, either way

Answer 15

ok then 1x?

Answer 16

Yes! So x = -7

Answer 17

oh ok thank you!...um do you have time for a few more?

Answer 18

Sure, just close this question and open a new one :)

Answer 19

You can also click "Best Response" to let someone know that they helped you.

Answer 20

ok :)

Answer 21

When you open a new question, you can also tag me by putting @sleepyjess in the comment box