Question

l2x+1l=7

absolute value.

Answer 1

2x + 1 = 7 & 2x + 1 = -7

Solve.

Answer 2

l2x+1l=7


2x+1=7 or 2x+1=-7


2x=7-1 or 2x=-7-1


2x=6 or 2x=-8


x=6/2 or x=-8/2


x=3 or x=-4

Answer 3

x=3... right?

Answer 4

or x = -4

Answer 5

both solutions work

Answer 6

okay... so if i was doing lx-4l=9 would x=14?

Answer 7

no, because


lx-4l=9

l14-4l=9

l10l=9

10=9...which is false

Answer 8

oops typo.. i mean 13?

Answer 9

yes

lx-4l=9

l13-4l=9

l9l=9

9=9...which is true


there is another solution, what is it?

Answer 10

lx+4l=9
so would it be 9-4=5... so x would equal 5?

Answer 11

More like -5 since

|x-4| = 9

|-5-4| = 9

|-9| = 9

9 = 9 ... which is true

Answer 12

woohoo! im getting the hang of this.