SOLUTION: Please help with solving these inequalities! They're SO confusing to me! I know you have to flip the inequality when it's a negative or something like that, but i just don't know h

Algebra.Com
Question 409020: Please help with solving these inequalities! They're SO confusing to me! I know you have to flip the inequality when it's a negative or something like that, but i just don't know how to go about it!
1) -1 > -x + 3
2) -7 - 2m >(or equal to)-9
3) a
--- <(or equal to)9
-3
Thanks if you can help! :)

Answer by checkley79(3341)   (Show Source): You can put this solution on YOUR website!
1) -1 > -x + 3 subtract 3.
-1-3>-x add the left side.
-4>-x divide by -1
4 Proof:
Let x=4.1
-1>-4.1+3
-1>-1.1
2) -7 - 2m >=-9 add seven.
-2n>=-9+7 add the right side.
-2n>=-2 divide by -2
n<=-2/-2
n<=1 ans.
Proof:
-7-2*1>=-9
-7-2>=-9
-9>=-9
3) a
--- <=9
-3
cross multiply:
a>=9*-3
a>=-27 ans.
Proof:
-27/-3<=9
9>=9

RELATED QUESTIONS

Okay, so I'm studying: Solving combined inequalities and they gave me these two problems: (answered by josmiceli)
Could someone please help me with a few problems on the Elimination Method? 1) 5x - y = (answered by jim_thompson5910,scott8148)
Hi! I would really appreciate some help solving these problems. "Graph the solution set... (answered by Theo)
Could someone please help? I need to graph a system of linear inequalities, then test to... (answered by jim_thompson5910,stanbon)
Again , third time im subbmitting this question. Guys if you dont know it please dont... (answered by jim_thompson5910)
Hello. I was hoping someone could please help me with a question that I do not know how... (answered by Fombitz)
Multipy. (x - 10)(x + 9) These are so confusing to me. Please help. Thank... (answered by sdmmadam@yahoo.com)
HELP PLEASE! WORD PROBLEMS ARE CONFUSING. I do not know how to solve nor how to express... (answered by Alan3354)
I would just like to know how to get an average of numbers I have tried to understand it... (answered by Cintchr)