translate and solve

twicw the difference of three and n is the same as nine subtracted from negative one times n

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- Apr 22nd 2006, 05:33 PMmaxmac97translate
translate and solve

twicw the difference of three and n is the same as nine subtracted from negative one times n - Apr 22nd 2006, 05:52 PMThePerfectHackerQuote:

Originally Posted by**maxmac97**

Open parantheses watch those signs :eek:

$\displaystyle 6-2n=-n-9$

Subtract 6 from both sides,

$\displaystyle -2n=-n-15$

Notice $\displaystyle -9-6=-15$ not $\displaystyle -9-6=3$.

Add $\displaystyle n$ to both sides,

$\displaystyle -n=-15$

Multiply both sides by -1 (the signs change)

$\displaystyle n=15$