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lbvjy [14]
3 years ago
12

-6n+21=12n-15 plz help really fast!

Mathematics
2 answers:
siniylev [52]3 years ago
8 0
<span>-6n+21=12n-15
Subtract 12n from -6n so that the variable n is only on one side.
-18n+21= -15
Subtract 21 from 15
-18n= -36
Divide both sides by -18 so that the only thing remaining on the left side is the variable n.
Final Answer: 2 *Note: When you divide a negative number by another negative number, it creates a positive number.</span>
ANEK [815]3 years ago
3 0
Hello there. ^•^

<span>-6n+21=12n-15 plz help really fast!
</span>
Take a way 12n from both sides.<span><span><span><span>−<span>6n</span></span>+21</span>−<span>12n</span></span>=<span><span><span>12n</span>−15</span>−<span>12n</span></span></span><span><span><span>−<span>18n</span></span>+21</span>=<span>−15
</span></span>Take a way 21 from both sides.<span><span><span><span>−<span>18n</span></span>+21</span>−21</span>=<span><span>−15</span>−21</span></span><span><span>−<span>18n</span></span>=<span>−36</span></span> 
divide both sides by -18.
<span><span><span>−<span>18n/</span></span><span>−18</span></span>=<span><span>−36/</span><span>−18

So answer is </span></span></span>n=<span>2</span>
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