Inequalities

Does anyone have a cluse as to what inequalities are or how to do them? My teacher sent me home with the ****. She said I had to do them, and it's spring break! By the way, this stuff is ****ing math.

Yea, inequalities are easy.

PM with exactly what you need help with in them. It will be easier for me to explain if I know where you are having trouble with them.

Treat inequalities like a normal equation but with > or < (or the equal to varients) instead of =, except if you wimes or multiply by a -ve number, change the direction of the sign.

Could you put that in english, please?

Sole like regular equations but eep the < or > as it is unless you are multiplying or dividing by a negative number. It is then switched. Are you in 9th grade?

here are a few examples

x + 2 < 3 you just subtract 2 from each side
-2 -2
x < 1



-3x + 7 > -14
-7 -7 subtract 7 from both sides
-3x > -21
divide both sides by negative 3
x<7

you can also think of it this way...

-3x > -21
+3x > +3x add 3x to both sides
0 > -21 + 3x
+21 +21 add 21 to both sides
21 > 3x
divide by three
7>x or you can write it x<7

do you see why you change the inequality's sign if you divide by a negative...its the same thing as adding it to both sides and then dividing...

Pretend the > or < is an equal sign and solve as you would normally

remember that if you divide across the sign, reverse it.

That's odd. now i'm confused. And dragon death. Give him a break man. he just came for a little help, which i might be doing since i got a C in math this quarter, and a B- and N last quarter. but inequalities are easy once you start to understand it. I learned them last year (7th. i'm in 8th now).

Lemme try to explain it real quick.
Here's an equation: 7x - 24 > -3
Step 1: add 24 to both sides: 7x-24(+24)>-3(+24) this cancels the 24 on the left.
Step 2: the new equation is 7x > 21. divide both sides by 7.
7x/7 > 21/7. this cances the 7 from the left.
Step 3: simplify: x > 3.

And that my friend, is how the magic is done. Although math is my worst subject (not to mention i hate it), these problems will stay with me forever... *sighs*