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Mathematics 7 Online
OpenStudy (anonymous):

9. Solve the inequality 8[x+3/4]<2

OpenStudy (mathlegend):

Are those supposed to be absolute value signs or parenthesis?

OpenStudy (mathlegend):

@isaiah993

OpenStudy (anonymous):

absolute value

OpenStudy (anonymous):

@MathLegend

OpenStudy (mathlegend):

Okay so remember when dealing with less than signs... we rewrite the inequality.

OpenStudy (mathlegend):

Wait is the 3/4 supposed to be a fraction?

OpenStudy (mathlegend):

@isaiah993

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

@MathLegend

OpenStudy (mathlegend):

So first change those absolute value sings into parenthesis and distribute.

OpenStudy (mathlegend):

8(x+3/4)<2 8x+6<2 (Do you follow?)

OpenStudy (mathlegend):

Now we change this using the less than rule.

OpenStudy (mathlegend):

-2<8x+6<2

OpenStudy (mathlegend):

Subtract 6 from all 3 sides.

OpenStudy (mathlegend):

-8<8x<-4 (Do you follow?)

OpenStudy (anonymous):

ok @mathlegend

OpenStudy (mathlegend):

So now you divide by the positive 8 on all 3 sides.

OpenStudy (anonymous):

ok so -1<x<-0.5

OpenStudy (mathlegend):

Yes

OpenStudy (anonymous):

actually -1>x>-0.5 because its negatives so you flip the sign

OpenStudy (anonymous):

nvm u dnt flip it ok

OpenStudy (mathlegend):

Right, you only flip if what you divide by is negative.

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