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Mathematics 7 Online
OpenStudy (anonymous):

lxl-2=3

OpenStudy (anonymous):

x = +- 5

OpenStudy (anonymous):

lol lx+12l =8

OpenStudy (anonymous):

I dont know how to do the absolute value symbols, so bear with me

OpenStudy (anonymous):

|x+12| = 8 is the same as | x -(-12)| = 8, therefore x is either -20 or -4.

OpenStudy (anonymous):

simply, |a - b| is the distance between a and b on the real axis.

OpenStudy (anonymous):

|6-x|=10 I know one of them is 4 but whats the other T_T

OpenStudy (anonymous):

\[|x+12|=8\] solve two equations \[x+12=8\] or \[x+12=-8\] first one gives \[x=-4\] second one gives \[x=-20\]

OpenStudy (anonymous):

lol fail. I forgot that was a negative

OpenStudy (anonymous):

lxl-3=6

OpenStudy (anonymous):

\[|6-x|=10\] same as \[|x-6|=10\] solve \[x-6=10\] or \[x-6=-10\]

OpenStudy (anonymous):

convince yourself that \[|a-b|=|b-a|\] so you do not have to deal with the annoying \[|6-x|\] just change to \[|x-6|\]

OpenStudy (anonymous):

whered you get the 10?

OpenStudy (anonymous):

you wrote \[|6-x|=10\] i just changed it to \[|x-6|=10\]

OpenStudy (anonymous):

lol. Thought we were working on this one D: lxl-3=6

OpenStudy (anonymous):

this one is easier. this one is \[|x|=9\] making \[x=\pm 9\]

OpenStudy (anonymous):

okay for lx+4l=3 you would make it 4+x=-3 and 4=x=3, correct?

OpenStudy (anonymous):

that last part was supposed to say 4+x=3

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