I have two answers which one is right which one is wrong???
find all the values of x
/x-3/=12
x=15
x=-15
x=9
x=-9
or
/x-3/=12
x=12
x=-12
Which one is right?
2007-09-04 05:25:09 · 6 answers · asked by rocker chick 2 in Science & Mathematics ➔ Mathematics
x=15
x=-9
those are the only to options (from the ones you provided)
2007-09-04 05:29:27 · answer #1 · answered by Rancio 2 · 0⤊ 0⤋
x-3 = 12 ==> x = 15
x-3 = -12 ==> x = -9
2007-09-04 12:30:12 · answer #2 · answered by civil_av8r 7 · 0⤊ 0⤋
/x/= x if x>0 and -x if x<0
here the value of x differs whether assume x as greater than or less than 3
1.. if x>3 then x-3>0
x-3=12 ie x=15
2. if x<3 then x-3<0
-(x-3)=12 x-3=-12 ie x=-9
2007-09-04 12:42:36 · answer #3 · answered by bujji 1 · 0⤊ 0⤋
i suppose the equation is absolute:
/x-3/=12
square both sides
x^2 - 6x+9 = 144
x^2 - 6x - 135=0
(x+9)(x-15)=0
x=-9 or x= 15
if it's not absolute :
/x-3/=12
x=15
2007-09-04 12:31:59 · answer #4 · answered by anoymous 2 · 0⤊ 0⤋
15, -9
2007-09-04 12:28:09 · answer #5 · answered by gebobs 6 · 0⤊ 0⤋
I have no idea why you are using the slashes.
If x-3 = 12, then add 3 to each side of the equation.
x=15
What could be simpler?
2007-09-04 12:35:20 · answer #6 · answered by the handyman 2 · 0⤊ 1⤋