Question

Giving Medal!

Which line shows the first error in the solution?
http://static.k12.com/bank_packages/files/media/mathml_9882e76c5d14bc7ac480b513c27c04e262239fa1_1.gif
Three more than a number divided by 4 is –12. What is the number?



A.
line1

B.
line 2

C.
line 3

D.
line 4

Answer 1

OK so the file you attached, any thoughts on what is wrong?

Answer 2

I need you to work with me here @NeedHelpQuick546 otherwise you won't learn anything and if you're not willing to work with me here, I have no reason to help you.

Answer 3

The VERY FIRST error is in the thinking. There was a bad idea going in. This evolved into a more tangible error, later. Where do you suppose it is? How would you solve it?

Answer 4

oh my gosh i'm so sorry. i left cuz my mom was calling me i'm just now getting back @iambatman

Answer 5

anyway i think line 2 is wrong

Answer 6

line 2 is not wrong

Answer 7

it's not?

Answer 8

we want to get the x term on one side and everything else on the other side. So 3 was subtracted from both sides

Answer 9

oh

Answer 10

now from there, combine like terms and what do you get ?

Answer 11

i don't know

Answer 12

x/4 + 3 = -12 -- subtract 3 from both sides
-3 -3
===========add

does it help if it is written like this

Answer 13

yeah thanks

Answer 14

the 3's cancel each other out on the left side...so what do you get when you combine like terms

Answer 15

-15?

Answer 16

yep...you get x/4 = -15.....now is that what line 3 says ?

Answer 17

-9

Answer 18

right...that is the first mistake....line 3

Answer 19

thank you! :)

Answer 20

sure thing :)