Question

Help me ? :) Pre calculus.
Solve the inequality. Please explain
-1< -x+ 7 < 10

Answer 1

try subtracting 7 to ALL sides and tell me what you get

Answer 2

-9<-x<3

Answer 3

don't you mean -8 < -x < 3

Answer 4

oops! i wrote the problem wrong. Its -2 not -1

Answer 5

how do i make x positive?

Answer 6

oh okay so you're right.

-9 < -x < 3

now divide everything by -1 and tell me what you get

Answer 7

9<x<-3

Answer 8

remember...you change the inequality signs when you divide by -1...

Answer 9

9> x>-3

Answer 10

right

Answer 11

Help me with one more?
please

Answer 12

-6<3-2(x-5)<14

Answer 13

so add 3 to all sides first

Answer 14

how to i add to the ( )

Answer 15

should i distribute it?

Answer 16

subtract 3 to all sides first*

Answer 17

-9<-2(x-5)<11

Answer 18

now distribute -2 into (x-5)

Answer 19

-9<-2x+10<11

Answer 20

now subtract 10 to all sides

Answer 21

-19<-2x<1

Answer 22

divide by 2? to get x alone?

Answer 23

now divide everything by -2

Answer 24

flip the inequality sign too right?

Answer 25

yes

Answer 26

19/2 <x<-1/2

Answer 27

you didn't flip the sign

Answer 28

> >

Answer 29

right

Answer 30

Thank you so much!