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Mathematics 14 Online
OpenStudy (anonymous):

how to solve 5/9x -11 < -51, I know the answer is x<-72, but how do you get that?

OpenStudy (campbell_st):

start by adding 11 to both sides of the inequality what do you get

OpenStudy (calculusfunctions):

The best method, in my opinion, is first multiply both sides of the equation by the least common denominator. Hence if (5/9)x − 11 < -51 then multiplying the equation by 9 yields 5x − 99 < -459 5x < -360 x < -360/5 ∴ x < -72

OpenStudy (anonymous):

you get -40

OpenStudy (campbell_st):

ok... next step is te eliminate the denominator so multiply both sides of the inequality by 9 can you do that

OpenStudy (anonymous):

so 5/9th +45 times 9, and -40 times 9?

OpenStudy (anonymous):

I mean 5/9=45

OpenStudy (campbell_st):

so you will have \[5x < 40\times9\]

OpenStudy (campbell_st):

last step is to divide both sides by 5

OpenStudy (anonymous):

where do you get the 40 from?

OpenStudy (campbell_st):

oops that should be - 40

OpenStudy (anonymous):

oh okay!

OpenStudy (anonymous):

can you show me step by step, I understand until I get to the -40

OpenStudy (anonymous):

I get it now, thank you so much :')

OpenStudy (calculusfunctions):

I thought I had already shown the solution but I guess my help wasn't wanted. lol

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