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Mathematics 19 Online
OpenStudy (anonymous):

Solve: will post the problem below

OpenStudy (anonymous):

\[3-x \le 5\] OR \[-2x-3>9\]

OpenStudy (anonymous):

@iGreen

OpenStudy (lochana):

so you want values for x right?

OpenStudy (anonymous):

no, i want like, where it would be on a number line

OpenStudy (igreen):

\(3 - x \le 5\) Subtract 3 to both side: \(-x \le 2\) Now multiply -1 to both sides. What's 2 * -1? @pigglet

OpenStudy (igreen):

Sorry I meant we have to divide -1 to both sides.. So what's 2 / -1? @pigglet

OpenStudy (anonymous):

-2 @iGreen

OpenStudy (anonymous):

@iGreen help?

OpenStudy (igreen):

Yep, that's right so we have: \(x \ge -2\) Remember to switch the sign when dividing by a negative number.

OpenStudy (igreen):

Now lets solve the other one.

OpenStudy (anonymous):

okay

OpenStudy (igreen):

\(-2x-3>9\) Add 3 to both sides: \(-2x>12\) Divide -2 to both sides, what's 12 / -2? @pigglet

OpenStudy (anonymous):

-6?

OpenStudy (igreen):

Yep, so we have: \(x < -6\) and \(x \ge -2\)

OpenStudy (igreen):

@pigglet

OpenStudy (anonymous):

thanks!

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