I don't quite understand it like the five other ones i had, so does anyone like mind explaining it to me. I'm not saying just give me the answer and leave like other YA stupid a$$es, i want an explanation if you feel like adding it:
(9lxl + 3) - 5 lxl -3= 12
2007-09-10 15:37:27 · 4 answers · asked by |♥*/♥\*♥| 3 in Science & Mathematics ➔ Mathematics
get rid of parenthesis
9|x|+3-5|x|-3=12
the 3's cancel out giving you
9|x|-5|x|=12
and therefore
4|x|=12.
Solve for the absolute value of x and you get +3 or -3.
2007-09-10 15:50:24 · answer #1 · answered by jtoosph22 2 · 0⤊ 0⤋
(9lxl + 3) - 5 lxl -3= 12
9lxl - 5|x| +3 - 3 = 12
(9-5)lxl + 0 = 12
4|x| = 12
divide both sides by 4
|x| = 12/4
|x| = 3
absolute value of any number comes out positive
|3| = 3 and |-3| = 3 right ? sure
==> x = 3 or x = -3
2007-09-11 08:15:01 · answer #2 · answered by aspx 4 · 0⤊ 0⤋
I am not really sure, maybe it is like this,
(9lxl+3) - 5lxl - 3 = 12 (move -5lxl-3 to the right)
9lxl+3= 5lxl + 15 (move 3 to the right and 5lxl to the left)
4lxl = 12 (move 4 to the right)
x= 12/4
and x=3
hope this will help
2007-09-10 22:55:39 · answer #3 · answered by Fayth 3 · 0⤊ 1⤋
Combine like terms:
4IxI = 12
Divide by 4: IxI = 3
x = 3 or x = -3
2007-09-10 22:42:19 · answer #4 · answered by jenh42002 7 · 0⤊ 0⤋