This week we learned about linear inequalities. The concept is extremely simple so you all should catch on rather quickly. Let’s start with the simply facts that you need to know for this particular lesson.
If you divide or multiply by a negative number, you must reverse the sign. It is VERY important that you do not forget to change the sign.
> this sign means greater than
< this sign means less than
≤ this sign means less than or equal to
≥ this sign means greater than or equal to
You will solve the equation just like any other. I usually just pretend that the inequality is an equal sign. This idea will help when working through the steps in your head.
EXAMPLE:
2x-8 > -2x
Move the x’s to one side, the integers to the other.
4x > 8
Next, you divide by four.
X > 2
That’s how it’s done.
--Sarah(:
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