td482000td td482000td

21-01-2016
Mathematics

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What value of x is in the solution set of –5x – 15 > 10 + 20x?

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crisforp crisforp

21-01-2016

-5x - 15 > 10 + 20x / + 15
-5x > 25 + 20x / - 20x
-25x > 25 / ÷ ( -25 )
x < - 1

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apologiabiology apologiabiology

21-01-2016

so isolate x on one side

-5x-15>10+20x
add 5x to both sides
-15>10+25x
subtract 10 from both sides
-25>25x
divid eboth sides by 25
-1>x
so anything smaller than -1 so exg -2,-2355,-45

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