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Mathematics 10 Online
OpenStudy (anonymous):

Solve. –7 ≥ 13 – 5x A. x ≥ –4 B. x ≤ –4 C. x ≥ 4 D. x ≤ 4

OpenStudy (anonymous):

x ≤ –4 ? @Dscdago

OpenStudy (anonymous):

You need isolate the x. Subtract the 13, so that the x its by itself

OpenStudy (anonymous):

so it's D. ?

OpenStudy (anonymous):

No, when you subtract 13, the equation should be -20>=-5x. From there you divide by -5. Since you are dividing by a negative, the sign changes direction.

OpenStudy (anonymous):

oh, okay. A .

OpenStudy (anonymous):

When you divide -20 by -5, the negative cancels. Leaving 4. So, -20/-5=4

OpenStudy (anonymous):

Subtract 13 from both sides so that it will be \[-20\ge -5x\] Divide both sides by -5 and when you divide by a negative switch the signs so it'll be \[4\le x\]

OpenStudy (anonymous):

x ≥ 4 ?

OpenStudy (anonymous):

After dividing, the answer is 4<=x. @WordGEEK has a good explanation.

OpenStudy (anonymous):

Yes, that's correct.

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