Question

Solve for x: |x| − 8 = −5

Answer 1

x>0 then x-8=-5 x=3
x<0 then -x-8=-5 x=-3

Answer 2

what about this one
Solve for x: -3|x + 7| = -12

Answer 3

x>7 then -3(x+7)=-12
x<-7 then 3(x+7)=-12
i think you can solve for x now... (:

Answer 4

but how do you find out what x is?

Answer 5

asking about the mod or just algebraic operations?

Answer 6

in the question

Answer 7

um asking in which part you are confused?

Answer 8

how you find out what x is, it could be anything really... and how you get 2 answers for x

Answer 9

hey if you will graph this equation then you will found two values of x for one y... and that what a mod function is,, i defined mod function as >0 or <0 by substituting x>7 or <7

Answer 10

okay... why did you choose 7?

Answer 11

`coz i want to take mod +ive or -ive and neighbours of 7 were capable of it :P

Answer 12

is -3 the first one?

Answer 13

yes

Answer 14

and then it would be 11?

Answer 15

-11

Answer 16

okay, thanks :D