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Mathematics 7 Online
OpenStudy (anonymous):

Find the solution set for the equation: (See below)

OpenStudy (anonymous):

\[|x+7|=10\]

OpenStudy (valpey):

With that absolute value you can re-write it as \[x+7 = 10\]or\[x+7 = -10\]

OpenStudy (anonymous):

Right and I have \[x=3\] or \[x=-3\]

OpenStudy (anonymous):

But it wants it in solution set form. {...}

OpenStudy (anonymous):

So would it be {-3,3}

OpenStudy (anonymous):

that is not the right solution

OpenStudy (anonymous):

\[x+7=10\iff x=3\] is right, but \[x+7=-10\iff x=-17\]

OpenStudy (anonymous):

if you want a "solution set" you can write \(\{-17,3\}\)

OpenStudy (anonymous):

So you don't make all the components a negative? For example \[x-7=-10\]?

OpenStudy (anonymous):

nope you deal with whatever you are given

OpenStudy (anonymous):

\[|\text{whatever}|=p\] \[\text{whatever}=p\] or \[\text{whatever} =-p\]

OpenStudy (anonymous):

Okay got it now. Thanks! I just got confused with the changing the negative in the one problem.

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