Question

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

Answer 1

-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.

Answer 2

Hello there. ^•^

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

Take a way 12n from both sides.−6n+21−12n=12n−15−12n−18n+21=−15
Take a way 21 from both sides.−18n+21−21=−15−21−18n=−36 
divide both sides by -18.−18n/−18=−36/−18

So answer is n=2