Question

-2/5x-9<9/10
-2/5x-9+9<9/10+9
-2/5x<18/10
I know I need to get rid of 2/5
Is this how? (5/2)-2/5x<18/10(5/2) I can't remember exactly how to isolate the x and usually I'm good at this stuff. Thanks.

Answer 1

you have to multiply both sides by (-5/2). dont forget to reverse the inequality because youre multiplying by a negative

Answer 2

(-2/5)-2/5x>18/10(-2/5)
x>90/20 or 4.5

Answer 3

your original work is wrong:
you wrote
-2/5x-9+9<9/10+9
-2/5x<18/10
you were supposed to add 9, but you added 1. you need a common denominator to add fractions. change the 9 to 90/10 and then try again

Answer 4

*on the right side only

Answer 5

Ok, ty, i'm gonna try it again.
-2/5x-9<9/10
+9<9/10+90/10
-2/5x<99/10
(-2/5)-2/5x<99/10(-2/5)
x>99/10(-2/5)
x>-198/-50
or do I find the common denominator and do
x>99/10(-20/10)
x>-1980/100
x>-19.8
can someone check this and tell me what is the right way to do this?

Answer 6

you multiplied by (-2/5). you either have to multiply by (-5/2) or divide by (-2/5)

Answer 7

ill show how to work out this problem

Answer 8

omg, I must be getting tired. Thank You for all your help. I'm still learning. The fractions confuse me.

Answer 9

(-2/5)x-9<9/10
add 9 to both sides
(-2/5)x <9/10+99/10
(-2/5)x<99/10
divide by (-2/5)
x>(99/10)/(-2/5)
x>-24.75 or -99/4

Answer 10

Ok, I see! Thanks for being patient with me.

Answer 11

no problem, if you need more help just ask!!

Answer 12

Ok :-)