Question

Please help me!
Solve for x: |4x + 12| = 16

x = 7, x = –7
x = 1, x = –1
x = 1, x = –7
x = –1, x = 7

Which answer is it??? Need help!

Answer 1

Lets walk through this.

Answer 2

OK!

Answer 3

Subtract 12 from both sides 4x + 12 - 12 = 16 - 12 > This gives us what?

Answer 4

4?

Answer 5

Correct 4x = 4 so now divide both sides by 4 > \[\frac{ 4x }{ 4 } = \frac{ 4 }{ 4 }\]

Answer 6

What do you get?

Answer 7

1?

Answer 8

Correct so now we have x = ?

Answer 9

1?

Answer 10

Yes x = 1, Now lets solve for our second x

Answer 11

OK

Answer 12

So subtract 12 from both sides again 4x + 12 - 12 = -16 - 2 > gives us what?

Answer 13

0?

Answer 14

No try this time instead of guessing :).

Answer 15

-12

Answer 16

- 16 - 12

Answer 17

OK well I see 12 on the other side, So that's why I though 12-12 0. But Im not sure what to do really

Answer 18

-16 (negative minus a negative basically means your adding the 2 but they end up a negative so -2 - 2 is basically 2 +2 for negatives, so we would get -4)

Answer 19

So try again > 4x + 12 - 12 = -16 - 12

Answer 20

OK I am following
..

Answer 21

-7

Answer 22

I see you went ahead and did the division, correct. x = -7

Answer 23

Oh well thank you SOOO much!!!

Answer 24

Sure thing.