Question

Can someone help me on this? Can't figure out how to do this, and my grades depend on it!
-10 > -2(2x - 9)

Answer 1

could you solve that if it were an = sign instead?

Answer 2

The only thing to remember here, is iff you multiply or divide by a negative, the signs on every term will switch, and you also have to switch the > < around too

Answer 3

if you want to multiply both sides by -1 to maybe clean it up a bit, you also have to change the sign

-1*-10 < -1*-2(2x - 9)

10 < 2*(2x-9)

that is the only thing to watch out for

Answer 4

ie

-16 < 16

same thing with the -1 on that

16 > -16

see the sign has to flip to keep true

Answer 5

are you here ?

Answer 6

Yeah. I'm still trying to figure it out according to what Dan is saying.

Answer 7

so my opinion that you can dividing both sides by 2 - yes - so what will get ?

Answer 8

do you wan cooperate please ?

Answer 9

so you get

-5> - (2x-9) yes ?

Answer 10

yes.

Answer 11

-(2x-9) = ?

Answer 12

= -2x+9 = 9-2x --- yes ?

Answer 13

so

-5 > 9-2x - subtract from both sides -9 - so what will get ?

Answer 14

not minus 9 just 9 - sorry

Answer 15

-14 > 2x?? Sorry, really bad at this.

Answer 16

why +2x ?

Answer 17

above was 9-2x - yes ?

Answer 18

so what will get ?

Answer 19

-14>-2x - yes ?

Answer 20

are you here ?

Answer 21

divide both sides by 2 and will get

-7>-x

Answer 22

so what have said above Dan to you ,than

-7 > -x so than x > 7

hope you understand it

Answer 23

sorry you never responded, thought you left

Answer 24

^Dan JavaScript Eh? :P

Answer 25

\[-10>-4x+18\] I distributed the 2 \[-28>-4x\] I subtracted 18 on each side\[7<x\] I divided the negative 4 on each side to get the variable alone.
I switched the sign because when you divide a negative on each side, you have to flip the sign.

I took pre-algrebra two years ago and I hope this helps, it seems that you got the answer, but I thought this might help explain the steps.