Annoying algebra problems. Solve and graphing inequalities.

Question

anonymous · Answer

$$-4x \le -24$$

anonymous · Answer

If that was an equation, how would you get the x value on its own? i.e.$$-4x=-24$$

anonymous · Answer

Divide  -4 to -24 right?

anonymous · Answer

Bingo! So you do exactly the same thing here. There's one caveat though, when you multiply/divide an INequality by a negative number, the inequality switches directions.

anonymous · Answer

The thing is, I know that the answer is x=6. But i have  to graph it. and i get confused when it switches

anonymous · Answer

OH so it does switch! :D Whoo! Thanks so it would go from point left to write?

anonymous · Answer

So if you have $$-5 \le -3$$, when you multiply by (for example) -2, you get $$(-5)(-2) \le (-3)(-2)$$$$10 \le 6$$. Clearly, 10 is not less than 6, so negative numbers mean you point the inequality symbol the other way.

anonymous · Answer

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