Solve for x: −2x + 5 −1 x −6 x

Question

Solve for x: −2x + 5 < 7 (1 point) x > −1 x < −1 x > −6 x < −6

mathwizzard3 · Answer

What do you think you do first?

impracticaljoker · Answer

I was thinking that < would act as a = sign so subtract 5 on both sides?

mathwizzard3 · Answer

Yep! The only difference is that if you divided or multiply by a negative you flip it

impracticaljoker · Answer

so -2x > 2

mathwizzard3 · Answer

Yeah! Now you would?

impracticaljoker · Answer

divide -2 on both sides?

mathwizzard3 · Answer

Yup and because you are dividing by a negative you would flip it

impracticaljoker · Answer

I don't have my caculator.

mathwizzard3 · Answer

So
x > -1

mathwizzard3 · Answer

Hope that helped ^-^

impracticaljoker · Answer

Thanks! Can you help me with a couple more?

mathwizzard3 · Answer

Sure!

impracticaljoker · Answer

Should I open a new thread or post it here?

mathwizzard3 · Answer

I think your suppose to open a new one but here is fine c:

impracticaljoker · Answer

Ok

impracticaljoker · Answer

This one is a little more complex Solve for x: 3 − (2x − 5) < −4(x + 2) (1 point) x < −8 x > −8 x < −3 x > −3

impracticaljoker · Answer

I don't know where to start

impracticaljoker · Answer

Im guessing you're baffled as well.

mathwizzard3 · Answer

Oh wait no I was getting distracted

mathwizzard3 · Answer

First you would distribute the negative sign on the left side

impracticaljoker · Answer

how? .-.

mathwizzard3 · Answer

Okay it' does sound a little confusing let me draw a picture

impracticaljoker · Answer

ok

mathwizzard3 · Answer

|dw:1472234634590:dw|
So the 3 just stays and you multiply everything in the parenthesis by that negative sign but the trick to remember is that the negative sign secretly has a one so it is a -1